1463 lines
52 KiB
Plaintext
1463 lines
52 KiB
Plaintext
16 The list of available commands
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*********************************
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In this chapter, we list all commands that are available in GRUB.
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Commands belong to different groups. A few can only be used in the
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global section of the configuration file (or "menu"); most of them can
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be entered on the command-line and can be used either anywhere in the
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menu or specifically in the menu entries.
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In rescue mode, only the 'insmod' (*note insmod::), 'ls' (*note
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ls::), 'set' (*note set::), and 'unset' (*note unset::) commands are
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normally available. If you end up in rescue mode and do not know what
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to do, then *note GRUB only offers a rescue shell::.
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16.1 The list of commands for the menu only
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===========================================
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The semantics used in parsing the configuration file are the following:
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* The files _must_ be in plain-text format.
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* '#' at the beginning of a line in a configuration file means it is
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only a comment.
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* Options are separated by spaces.
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* All numbers can be either decimal or hexadecimal. A hexadecimal
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number must be preceded by '0x', and is case-insensitive.
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These commands can only be used in the menu:
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16.1.1 menuentry
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----------------
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-- Command: menuentry TITLE ['--class=class' ...] ['--users=users']
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['--unrestricted'] ['--hotkey=key'] ['--id=id'] [ARG ...] {
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COMMAND; ... }
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This defines a GRUB menu entry named TITLE. When this entry is
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selected from the menu, GRUB will set the CHOSEN environment
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variable to value of '--id' if '--id' is given, execute the list of
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commands given within braces, and if the last command in the list
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returned successfully and a kernel was loaded it will execute the
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'boot' command.
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The '--class' option may be used any number of times to group menu
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entries into classes. Menu themes may display different classes
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using different styles.
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The '--users' option grants specific users access to specific menu
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entries. *Note Security::.
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The '--unrestricted' option grants all users access to specific
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menu entries. *Note Security::.
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The '--hotkey' option associates a hotkey with a menu entry. KEY
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may be a single letter, or one of the aliases 'backspace', 'tab',
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or 'delete'.
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The '--id' may be used to associate unique identifier with a menu
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entry. ID is string of ASCII aphanumeric characters, underscore
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and hyphen and should not start with a digit.
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All other arguments including TITLE are passed as positional
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parameters when list of commands is executed with TITLE always
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assigned to '$1'.
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16.1.2 submenu
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--------------
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-- Command: submenu TITLE ['--class=class' ...] ['--users=users']
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['--unrestricted'] ['--hotkey=key'] ['--id=id'] { MENU ENTRIES
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... }
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This defines a submenu. An entry called TITLE will be added to the
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menu; when that entry is selected, a new menu will be displayed
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showing all the entries within this submenu.
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All options are the same as in the 'menuentry' command (*note
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menuentry::).
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16.2 The list of general commands
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=================================
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Commands usable anywhere in the menu and in the command-line.
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16.2.1 serial
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-------------
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-- Command: serial ['--unit=unit'] ['--port=port'] ['--speed=speed']
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['--word=word'] ['--parity=parity'] ['--stop=stop']
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Initialize a serial device. UNIT is a number in the range 0-3
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specifying which serial port to use; default is 0, which
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corresponds to the port often called COM1. PORT is the I/O port
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where the UART is to be found; if specified it takes precedence
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over UNIT. SPEED is the transmission speed; default is 9600. WORD
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and STOP are the number of data bits and stop bits. Data bits must
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be in the range 5-8 and stop bits must be 1 or 2. Default is 8
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data bits and one stop bit. PARITY is one of 'no', 'odd', 'even'
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and defaults to 'no'.
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The serial port is not used as a communication channel unless the
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'terminal_input' or 'terminal_output' command is used (*note
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terminal_input::, *note terminal_output::).
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See also *note Serial terminal::.
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16.2.2 terminal_input
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---------------------
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-- Command: terminal_input ['--append'|'--remove'] [terminal1]
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[terminal2] ...
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List or select an input terminal.
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With no arguments, list the active and available input terminals.
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With '--append', add the named terminals to the list of active
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input terminals; any of these may be used to provide input to GRUB.
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With '--remove', remove the named terminals from the active list.
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With no options but a list of terminal names, make only the listed
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terminal names active.
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16.2.3 terminal_output
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----------------------
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-- Command: terminal_output ['--append'|'--remove'] [terminal1]
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[terminal2] ...
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List or select an output terminal.
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With no arguments, list the active and available output terminals.
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With '--append', add the named terminals to the list of active
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output terminals; all of these will receive output from GRUB.
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With '--remove', remove the named terminals from the active list.
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With no options but a list of terminal names, make only the listed
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terminal names active.
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16.2.4 terminfo
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---------------
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-- Command: terminfo [-a|-u|-v] [term]
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Define the capabilities of your terminal by giving the name of an
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entry in the terminfo database, which should correspond roughly to
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a 'TERM' environment variable in Unix.
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The currently available terminal types are 'vt100', 'vt100-color',
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'ieee1275', and 'dumb'. If you need other terminal types, please
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contact us to discuss the best way to include support for these in
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GRUB.
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The '-a' ('--ascii'), '-u' ('--utf8'), and '-v' ('--visual-utf8')
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options control how non-ASCII text is displayed. '-a' specifies an
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ASCII-only terminal; '-u' specifies logically-ordered UTF-8; and
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'-v' specifies "visually-ordered UTF-8" (in other words, arranged
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such that a terminal emulator without bidirectional text support
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will display right-to-left text in the proper order; this is not
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really proper UTF-8, but a workaround).
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If no option or terminal type is specified, the current terminal
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type is printed.
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16.3 The list of command-line and menu entry commands
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=====================================================
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These commands are usable in the command-line and in menu entries. If
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you forget a command, you can run the command 'help' (*note help::).
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16.3.1 [
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--------
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-- Command: '[' expression ']'
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Alias for 'test EXPRESSION' (*note test::).
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16.3.2 acpi
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-----------
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-- Command: acpi ['-1'|'-2']
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['--exclude=table1,...'|'--load-only=table1,...']
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['--oemid=id'] ['--oemtable=table'] ['--oemtablerev=rev']
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['--oemtablecreator=creator'] ['--oemtablecreatorrev=rev']
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['--no-ebda'] filename ...
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Modern BIOS systems normally implement the Advanced Configuration
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and Power Interface (ACPI), and define various tables that describe
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the interface between an ACPI-compliant operating system and the
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firmware. In some cases, the tables provided by default only work
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well with certain operating systems, and it may be necessary to
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replace some of them.
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Normally, this command will replace the Root System Description
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Pointer (RSDP) in the Extended BIOS Data Area to point to the new
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tables. If the '--no-ebda' option is used, the new tables will be
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known only to GRUB, but may be used by GRUB's EFI emulation.
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16.3.3 authenticate
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-------------------
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-- Command: authenticate [userlist]
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Check whether user is in USERLIST or listed in the value of
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variable 'superusers'. See *note superusers:: for valid user list
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format. If 'superusers' is empty, this command returns true.
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*Note Security::.
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16.3.4 background_color
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-----------------------
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-- Command: background_color color
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Set background color for active terminal. For valid color
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specifications see *note Colors: Theme file format. Background
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color can be changed only when using 'gfxterm' for terminal output.
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This command sets color of empty areas without text. Text
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background color is controlled by environment variables
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COLOR_NORMAL, COLOR_HIGHLIGHT, MENU_COLOR_NORMAL,
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MENU_COLOR_HIGHLIGHT. *Note Special environment variables::.
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16.3.5 background_image
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-----------------------
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-- Command: background_image [['--mode' 'stretch'|'normal'] file]
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Load background image for active terminal from FILE. Image is
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stretched to fill up entire screen unless option '--mode' 'normal'
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is given. Without arguments remove currently loaded background
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image. Background image can be changed only when using 'gfxterm'
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for terminal output.
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16.3.6 badram
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-------------
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-- Command: badram addr,mask[,addr,mask...]
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Filter out bad RAM.
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This command notifies the memory manager that specified regions of
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RAM ought to be filtered out (usually, because they're damaged). This
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remains in effect after a payload kernel has been loaded by GRUB, as
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long as the loaded kernel obtains its memory map from GRUB. Kernels that
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support this include Linux, GNU Mach, the kernel of FreeBSD and
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Multiboot kernels in general.
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Syntax is the same as provided by the Memtest86+ utility
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(http://www.memtest.org/): a list of address/mask pairs. Given a
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page-aligned address and a base address / mask pair, if all the bits of
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the page-aligned address that are enabled by the mask match with the
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base address, it means this page is to be filtered. This syntax makes
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it easy to represent patterns that are often result of memory damage,
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due to physical distribution of memory cells.
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16.3.7 blocklist
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----------------
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-- Command: blocklist file
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Print a block list (*note Block list syntax::) for FILE.
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16.3.8 boot
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-----------
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-- Command: boot
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Boot the OS or chain-loader which has been loaded. Only necessary
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if running the fully interactive command-line (it is implicit at
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the end of a menu entry).
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16.3.9 cat
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----------
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-- Command: cat ['--dos'] file
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Display the contents of the file FILE. This command may be useful
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to remind you of your OS's root partition:
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grub> cat /etc/fstab
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If the '--dos' option is used, then carriage return / new line
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pairs will be displayed as a simple new line. Otherwise, the
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carriage return will be displayed as a control character ('<d>') to
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make it easier to see when boot problems are caused by a file
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formatted using DOS-style line endings.
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16.3.10 chainloader
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-------------------
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-- Command: chainloader ['--force'] file
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Load FILE as a chain-loader. Like any other file loaded by the
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filesystem code, it can use the blocklist notation (*note Block
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list syntax::) to grab the first sector of the current partition
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with '+1'. If you specify the option '--force', then load FILE
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forcibly, whether it has a correct signature or not. This is
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required when you want to load a defective boot loader, such as SCO
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UnixWare 7.1.
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16.3.11 clear
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-------------
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-- Command: clear
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Clear the screen.
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16.3.12 cmosclean
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-----------------
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-- Command: cmosclean byte:bit
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Clear value of bit in CMOS at location BYTE:BIT. This command is
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available only on platforms that support CMOS.
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16.3.13 cmosdump
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----------------
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-- Dump: CMOS contents
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Dump full CMOS contents as hexadecimal values. This command is
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available only on platforms that support CMOS.
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16.3.14 cmostest
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----------------
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-- Command: cmostest byte:bit
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Test value of bit in CMOS at location BYTE:BIT. Exit status is
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zero if bit is set, non zero otherwise. This command is available
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only on platforms that support CMOS.
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16.3.15 cmp
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-----------
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-- Command: cmp file1 file2
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Compare the file FILE1 with the file FILE2. If they differ in
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size, print the sizes like this:
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Differ in size: 0x1234 [foo], 0x4321 [bar]
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If the sizes are equal but the bytes at an offset differ, then
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print the bytes like this:
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Differ at the offset 777: 0xbe [foo], 0xef [bar]
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If they are completely identical, nothing will be printed.
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16.3.16 configfile
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------------------
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-- Command: configfile file
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Load FILE as a configuration file. If FILE defines any menu
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entries, then show a menu containing them immediately. Any
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environment variable changes made by the commands in FILE will not
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be preserved after 'configfile' returns.
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16.3.17 cpuid
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-------------
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-- Command: cpuid [-l] [-p]
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Check for CPU features. This command is only available on x86
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systems.
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With the '-l' option, return true if the CPU supports long mode
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(64-bit).
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With the '-p' option, return true if the CPU supports Physical
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Address Extension (PAE).
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If invoked without options, this command currently behaves as if it
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had been invoked with '-l'. This may change in the future.
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16.3.18 crc
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-----------
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-- Command: crc arg ...
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Alias for 'hashsum --hash crc32 arg ...'. See command 'hashsum'
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(*note hashsum::) for full description.
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16.3.19 cryptomount
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-------------------
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-- Command: cryptomount device|'-u' uuid|'-a'|'-b'
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Setup access to encrypted device. If necessary, passphrase is
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requested interactively. Option DEVICE configures specific grub
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device (*note Naming convention::); option '-u' UUID configures
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device with specified UUID; option '-a' configures all detected
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encrypted devices; option '-b' configures all geli containers that
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have boot flag set.
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GRUB suports devices encrypted using LUKS and geli. Note that
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necessary modules (LUKS and GELI) have to be loaded manually before
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this command can be used.
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16.3.20 date
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------------
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-- Command: date [[year-]month-day] [hour:minute[:second]]
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With no arguments, print the current date and time.
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Otherwise, take the current date and time, change any elements
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specified as arguments, and set the result as the new date and
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time. For example, 'date 01-01' will set the current month and day
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to January 1, but leave the year, hour, minute, and second
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unchanged.
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16.3.21 linux
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-------------
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-- Command: devicetree file
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Load a device tree blob (.dtb) from a filesystem, for later use by
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a Linux kernel. Does not perform merging with any device tree
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supplied by firmware, but rather replaces it completely. *note
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GNU/Linux::.
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16.3.22 distrust
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----------------
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-- Command: distrust pubkey_id
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Remove public key PUBKEY_ID from GRUB's keyring of trusted keys.
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PUBKEY_ID is the last four bytes (eight hexadecimal digits) of the
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GPG v4 key id, which is also the output of 'list_trusted' (*note
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list_trusted::). Outside of GRUB, the key id can be obtained using
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'gpg --fingerprint'). These keys are used to validate signatures
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when environment variable 'check_signatures' is set to 'enforce'
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(*note check_signatures::), and by some invocations of
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'verify_detached' (*note verify_detached::). *Note Using digital
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signatures::, for more information.
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16.3.23 drivemap
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----------------
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-- Command: drivemap '-l'|'-r'|['-s'] from_drive to_drive
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Without options, map the drive FROM_DRIVE to the drive TO_DRIVE.
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This is necessary when you chain-load some operating systems, such
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as DOS, if such an OS resides at a non-first drive. For
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convenience, any partition suffix on the drive is ignored, so you
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can safely use ${root} as a drive specification.
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With the '-s' option, perform the reverse mapping as well, swapping
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the two drives.
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With the '-l' option, list the current mappings.
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With the '-r' option, reset all mappings to the default values.
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For example:
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drivemap -s (hd0) (hd1)
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16.3.24 echo
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------------
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-- Command: echo ['-n'] ['-e'] string ...
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Display the requested text and, unless the '-n' option is used, a
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trailing new line. If there is more than one string, they are
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separated by spaces in the output. As usual in GRUB commands,
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variables may be substituted using '${var}'.
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The '-e' option enables interpretation of backslash escapes. The
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following sequences are recognised:
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'\\'
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backslash
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'\a'
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alert (BEL)
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'\c'
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suppress trailing new line
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'\f'
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form feed
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'\n'
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new line
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'\r'
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carriage return
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'\t'
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horizontal tab
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'\v'
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vertical tab
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When interpreting backslash escapes, backslash followed by any
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other character will print that character.
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16.3.25 eval
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------------
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-- Command: eval string ...
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Concatenate arguments together using single space as separator and
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evaluate result as sequence of GRUB commands.
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16.3.26 export
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--------------
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-- Command: export envvar
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Export the environment variable ENVVAR. Exported variables are
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visible to subsidiary configuration files loaded using
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'configfile'.
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16.3.27 false
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-------------
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-- Command: false
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Do nothing, unsuccessfully. This is mainly useful in control
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constructs such as 'if' and 'while' (*note Shell-like scripting::).
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16.3.28 gettext
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---------------
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-- Command: gettext string
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Translate STRING into the current language.
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The current language code is stored in the 'lang' variable in
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GRUB's environment (*note lang::). Translation files in MO format
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are read from 'locale_dir' (*note locale_dir::), usually
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'/boot/grub/locale'.
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16.3.29 gptsync
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---------------
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-- Command: gptsync device [partition[+/-[type]]] ...
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Disks using the GUID Partition Table (GPT) also have a legacy
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Master Boot Record (MBR) partition table for compatibility with the
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BIOS and with older operating systems. The legacy MBR can only
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represent a limited subset of GPT partition entries.
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This command populates the legacy MBR with the specified PARTITION
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entries on DEVICE. Up to three partitions may be used.
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TYPE is an MBR partition type code; prefix with '0x' if you want to
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enter this in hexadecimal. The separator between PARTITION and
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TYPE may be '+' to make the partition active, or '-' to make it
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inactive; only one partition may be active. If both the separator
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and type are omitted, then the partition will be inactive.
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16.3.30 halt
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------------
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-- Command: halt '--no-apm'
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The command halts the computer. If the '--no-apm' option is
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specified, no APM BIOS call is performed. Otherwise, the computer
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|
is shut down using APM.
|
|
|
|
16.3.31 hashsum
|
|
---------------
|
|
|
|
-- Command: hashsum '--hash' hash '--keep-going' '--uncompress'
|
|
'--check' file ['--prefix' dir]|file ...
|
|
Compute or verify file hashes. Hash type is selected with option
|
|
'--hash'. Supported hashes are: 'adler32', 'crc64', 'crc32',
|
|
'crc32rfc1510', 'crc24rfc2440', 'md4', 'md5', 'ripemd160', 'sha1',
|
|
'sha224', 'sha256', 'sha512', 'sha384', 'tiger192', 'tiger',
|
|
'tiger2', 'whirlpool'. Option '--uncompress' uncompresses files
|
|
before computing hash.
|
|
|
|
When list of files is given, hash of each file is computed and
|
|
printed, followed by file name, each file on a new line.
|
|
|
|
When option '--check' is given, it points to a file that contains
|
|
list of HASH NAME pairs in the same format as used by UNIX 'md5sum'
|
|
command. Option '--prefix' may be used to give directory where
|
|
files are located. Hash verification stops after the first
|
|
mismatch was found unless option '--keep-going' was given. The
|
|
exit code '$?' is set to 0 if hash verification is successful. If
|
|
it fails, '$?' is set to a nonzero value.
|
|
|
|
16.3.32 help
|
|
------------
|
|
|
|
-- Command: help [pattern ...]
|
|
Display helpful information about builtin commands. If you do not
|
|
specify PATTERN, this command shows short descriptions of all
|
|
available commands.
|
|
|
|
If you specify any PATTERNS, it displays longer information about
|
|
each of the commands whose names begin with those PATTERNS.
|
|
|
|
16.3.33 initrd
|
|
--------------
|
|
|
|
-- Command: initrd file
|
|
Load an initial ramdisk for a Linux kernel image, and set the
|
|
appropriate parameters in the Linux setup area in memory. This may
|
|
only be used after the 'linux' command (*note linux::) has been
|
|
run. See also *note GNU/Linux::.
|
|
|
|
16.3.34 initrd16
|
|
----------------
|
|
|
|
-- Command: initrd16 file
|
|
Load an initial ramdisk for a Linux kernel image to be booted in
|
|
16-bit mode, and set the appropriate parameters in the Linux setup
|
|
area in memory. This may only be used after the 'linux16' command
|
|
(*note linux16::) has been run. See also *note GNU/Linux::.
|
|
|
|
This command is only available on x86 systems.
|
|
|
|
16.3.35 insmod
|
|
--------------
|
|
|
|
-- Command: insmod module
|
|
Insert the dynamic GRUB module called MODULE.
|
|
|
|
16.3.36 keystatus
|
|
-----------------
|
|
|
|
-- Command: keystatus ['--shift'] ['--ctrl'] ['--alt']
|
|
Return true if the Shift, Control, or Alt modifier keys are held
|
|
down, as requested by options. This is useful in scripting, to
|
|
allow some user control over behaviour without having to wait for a
|
|
keypress.
|
|
|
|
Checking key modifier status is only supported on some platforms.
|
|
If invoked without any options, the 'keystatus' command returns
|
|
true if and only if checking key modifier status is supported.
|
|
|
|
16.3.37 linux
|
|
-------------
|
|
|
|
-- Command: linux file ...
|
|
Load a Linux kernel image from FILE. The rest of the line is
|
|
passed verbatim as the "kernel command-line". Any initrd must be
|
|
reloaded after using this command (*note initrd::).
|
|
|
|
On x86 systems, the kernel will be booted using the 32-bit boot
|
|
protocol. Note that this means that the 'vga=' boot option will
|
|
not work; if you want to set a special video mode, you will need to
|
|
use GRUB commands such as 'set gfxpayload=1024x768' or 'set
|
|
gfxpayload=keep' (to keep the same mode as used in GRUB) instead.
|
|
GRUB can automatically detect some uses of 'vga=' and translate
|
|
them to appropriate settings of 'gfxpayload'. The 'linux16'
|
|
command (*note linux16::) avoids this restriction.
|
|
|
|
16.3.38 linux16
|
|
---------------
|
|
|
|
-- Command: linux16 file ...
|
|
Load a Linux kernel image from FILE in 16-bit mode. The rest of
|
|
the line is passed verbatim as the "kernel command-line". Any
|
|
initrd must be reloaded after using this command (*note
|
|
initrd16::).
|
|
|
|
The kernel will be booted using the traditional 16-bit boot
|
|
protocol. As well as bypassing problems with 'vga=' described in
|
|
*note linux::, this permits booting some other programs that
|
|
implement the Linux boot protocol for the sake of convenience.
|
|
|
|
This command is only available on x86 systems.
|
|
|
|
16.3.39 list_env
|
|
----------------
|
|
|
|
-- Command: list_env ['--file' file]
|
|
List all variables in the environment block file. *Note
|
|
Environment block::.
|
|
|
|
The '--file' option overrides the default location of the
|
|
environment block.
|
|
|
|
16.3.40 list_trusted
|
|
--------------------
|
|
|
|
-- Command: list_trusted
|
|
List all public keys trusted by GRUB for validating signatures.
|
|
The output is in GPG's v4 key fingerprint format (i.e., the output
|
|
of 'gpg --fingerprint'). The least significant four bytes (last
|
|
eight hexadecimal digits) can be used as an argument to 'distrust'
|
|
(*note distrust::). *Note Using digital signatures::, for more
|
|
information about uses for these keys.
|
|
|
|
16.3.41 load_env
|
|
----------------
|
|
|
|
-- Command: load_env ['--file' file] ['--skip-sig']
|
|
[whitelisted_variable_name] ...
|
|
Load all variables from the environment block file into the
|
|
environment. *Note Environment block::.
|
|
|
|
The '--file' option overrides the default location of the
|
|
environment block.
|
|
|
|
The '--skip-sig' option skips signature checking even when the
|
|
value of environment variable 'check_signatures' is set to
|
|
'enforce' (*note check_signatures::).
|
|
|
|
If one or more variable names are provided as arguments, they are
|
|
interpreted as a whitelist of variables to load from the
|
|
environment block file. Variables set in the file but not present
|
|
in the whitelist are ignored.
|
|
|
|
The '--skip-sig' option should be used with care, and should always
|
|
be used in concert with a whitelist of acceptable variables whose
|
|
values should be set. Failure to employ a carefully constructed
|
|
whitelist could result in reading a malicious value into critical
|
|
environment variables from the file, such as setting
|
|
'check_signatures=no', modifying 'prefix' to boot from an
|
|
unexpected location or not at all, etc.
|
|
|
|
When used with care, '--skip-sig' and the whitelist enable an
|
|
administrator to configure a system to boot only signed
|
|
configurations, but to allow the user to select from among multiple
|
|
configurations, and to enable "one-shot" boot attempts and
|
|
"savedefault" behavior. *Note Using digital signatures::, for more
|
|
information.
|
|
|
|
16.3.42 loadfont
|
|
----------------
|
|
|
|
-- Command: loadfont file ...
|
|
Load specified font files. Unless absolute pathname is given, FILE
|
|
is assumed to be in directory '$prefix/fonts' with suffix '.pf2'
|
|
appended. *Note Fonts: Theme file format.
|
|
|
|
16.3.43 loopback
|
|
----------------
|
|
|
|
-- Command: loopback ['-d'] device file
|
|
Make the device named DEVICE correspond to the contents of the
|
|
filesystem image in FILE. For example:
|
|
|
|
loopback loop0 /path/to/image
|
|
ls (loop0)/
|
|
|
|
With the '-d' option, delete a device previously created using this
|
|
command.
|
|
|
|
16.3.44 ls
|
|
----------
|
|
|
|
-- Command: ls [arg ...]
|
|
List devices or files.
|
|
|
|
With no arguments, print all devices known to GRUB.
|
|
|
|
If the argument is a device name enclosed in parentheses (*note
|
|
Device syntax::), then print the name of the filesystem of that
|
|
device.
|
|
|
|
If the argument is a directory given as an absolute file name
|
|
(*note File name syntax::), then list the contents of that
|
|
directory.
|
|
|
|
16.3.45 lsfonts
|
|
---------------
|
|
|
|
-- Command: lsfonts
|
|
List loaded fonts.
|
|
|
|
16.3.46 lsmod
|
|
-------------
|
|
|
|
-- Command: lsmod
|
|
Show list of loaded modules.
|
|
|
|
16.3.47 md5sum
|
|
--------------
|
|
|
|
-- Command: md5sum arg ...
|
|
Alias for 'hashsum --hash md5 arg ...'. See command 'hashsum'
|
|
(*note hashsum::) for full description.
|
|
|
|
16.3.48 module
|
|
--------------
|
|
|
|
-- Command: module [--nounzip] file [arguments]
|
|
Load a module for multiboot kernel image. The rest of the line is
|
|
passed verbatim as the module command line.
|
|
|
|
16.3.49 multiboot
|
|
-----------------
|
|
|
|
-- Command: multiboot [--quirk-bad-kludge]
|
|
[--quirk-modules-after-kernel] file ...
|
|
Load a multiboot kernel image from FILE. The rest of the line is
|
|
passed verbatim as the "kernel command-line". Any module must be
|
|
reloaded after using this command (*note module::).
|
|
|
|
Some kernels have known problems. You need to specify -quirk-* for
|
|
those. -quirk-bad-kludge is a problem seen in several products
|
|
that they include loading kludge information with invalid data in
|
|
ELF file. GRUB prior to 0.97 and some custom builds prefered ELF
|
|
information while 0.97 and GRUB 2 use kludge. Use this option to
|
|
ignore kludge. Known affected systems: old Solaris, SkyOS.
|
|
|
|
-quirk-modules-after-kernel is needed for kernels which load at
|
|
relatively high address e.g. 16MiB mark and can't cope with
|
|
modules stuffed between 1MiB mark and beginning of the kernel.
|
|
Known afftected systems: VMWare.
|
|
|
|
16.3.50 nativedisk
|
|
------------------
|
|
|
|
-- Command: nativedisk
|
|
Switch from firmware disk drivers to native ones. Really useful
|
|
only on platforms where both firmware and native disk drives are
|
|
available. Currently i386-pc, i386-efi, i386-ieee1275 and
|
|
x86_64-efi.
|
|
|
|
16.3.51 normal
|
|
--------------
|
|
|
|
-- Command: normal [file]
|
|
Enter normal mode and display the GRUB menu.
|
|
|
|
In normal mode, commands, filesystem modules, and cryptography
|
|
modules are automatically loaded, and the full GRUB script parser
|
|
is available. Other modules may be explicitly loaded using
|
|
'insmod' (*note insmod::).
|
|
|
|
If a FILE is given, then commands will be read from that file.
|
|
Otherwise, they will be read from '$prefix/grub.cfg' if it exists.
|
|
|
|
'normal' may be called from within normal mode, creating a nested
|
|
environment. It is more usual to use 'configfile' (*note
|
|
configfile::) for this.
|
|
|
|
16.3.52 normal_exit
|
|
-------------------
|
|
|
|
-- Command: normal_exit
|
|
Exit normal mode (*note normal::). If this instance of normal mode
|
|
was not nested within another one, then return to rescue mode.
|
|
|
|
16.3.53 parttool
|
|
----------------
|
|
|
|
-- Command: parttool partition commands
|
|
Make various modifications to partition table entries.
|
|
|
|
Each COMMAND is either a boolean option, in which case it must be
|
|
followed with '+' or '-' (with no intervening space) to enable or
|
|
disable that option, or else it takes a value in the form
|
|
'COMMAND=VALUE'.
|
|
|
|
Currently, 'parttool' is only useful on DOS partition tables (also
|
|
known as Master Boot Record, or MBR). On these partition tables,
|
|
the following commands are available:
|
|
|
|
'boot' (boolean)
|
|
When enabled, this makes the selected partition be the active
|
|
(bootable) partition on its disk, clearing the active flag on
|
|
all other partitions. This command is limited to _primary_
|
|
partitions.
|
|
|
|
'type' (value)
|
|
Change the type of an existing partition. The value must be a
|
|
number in the range 0-0xFF (prefix with '0x' to enter it in
|
|
hexadecimal).
|
|
|
|
'hidden' (boolean)
|
|
When enabled, this hides the selected partition by setting the
|
|
"hidden" bit in its partition type code; when disabled,
|
|
unhides the selected partition by clearing this bit. This is
|
|
useful only when booting DOS or Windows and multiple primary
|
|
FAT partitions exist in one disk. See also *note
|
|
DOS/Windows::.
|
|
|
|
16.3.54 password
|
|
----------------
|
|
|
|
-- Command: password user clear-password
|
|
Define a user named USER with password CLEAR-PASSWORD. *Note
|
|
Security::.
|
|
|
|
16.3.55 password_pbkdf2
|
|
-----------------------
|
|
|
|
-- Command: password_pbkdf2 user hashed-password
|
|
Define a user named USER with password hash HASHED-PASSWORD. Use
|
|
'grub-mkpasswd-pbkdf2' (*note Invoking grub-mkpasswd-pbkdf2::) to
|
|
generate password hashes. *Note Security::.
|
|
|
|
16.3.56 play
|
|
------------
|
|
|
|
-- Command: play file | tempo [pitch1 duration1] [pitch2 duration2] ...
|
|
Plays a tune
|
|
|
|
If the argument is a file name (*note File name syntax::), play the
|
|
tune recorded in it. The file format is first the tempo as an
|
|
unsigned 32bit little-endian number, then pairs of unsigned 16bit
|
|
little-endian numbers for pitch and duration pairs.
|
|
|
|
If the arguments are a series of numbers, play the inline tune.
|
|
|
|
The tempo is the base for all note durations. 60 gives a 1-second
|
|
base, 120 gives a half-second base, etc. Pitches are Hz. Set
|
|
pitch to 0 to produce a rest.
|
|
|
|
16.3.57 probe
|
|
-------------
|
|
|
|
-- Command: probe ['--set' var]
|
|
'--driver'|'--partmap'|'--fs'|'--fs-uuid'|'--label' device
|
|
Retrieve device information. If option '--set' is given, assign
|
|
result to variable VAR, otherwise print information on the screen.
|
|
|
|
16.3.58 pxe_unload
|
|
------------------
|
|
|
|
-- Command: pxe_unload
|
|
Unload the PXE environment (*note Network::).
|
|
|
|
This command is only available on PC BIOS systems.
|
|
|
|
16.3.59 rdmsr
|
|
-------------
|
|
|
|
-- Command:: rdmsr 0xADDR [-v VARNAME]
|
|
Read a model-specific register at address 0xADDR. If the parameter
|
|
'-v' is used and an environment variable VARNAME is given, set that
|
|
environment variable to the value that was read.
|
|
|
|
Please note that on SMP systems, reading from a MSR that has a
|
|
scope per hardware thread, implies that the value that is returned
|
|
only applies to the particular cpu/core/thread that runs the
|
|
command.
|
|
|
|
Also, if you specify a reserved or unimplemented MSR address, it
|
|
will cause a general protection exception (which is not currently
|
|
being handled) and the system will reboot.
|
|
|
|
16.3.60 read
|
|
------------
|
|
|
|
-- Command: read [var]
|
|
Read a line of input from the user. If an environment variable VAR
|
|
is given, set that environment variable to the line of input that
|
|
was read, with no terminating newline.
|
|
|
|
16.3.61 reboot
|
|
--------------
|
|
|
|
-- Command: reboot
|
|
Reboot the computer.
|
|
|
|
16.3.62 regexp
|
|
--------------
|
|
|
|
-- Command: regexp ['--set' [number:]var] regexp string
|
|
Test if regular expression REGEXP matches STRING. Supported
|
|
regular expressions are POSIX.2 Extended Regular Expressions. If
|
|
option '--set' is given, store NUMBERth matched subexpression in
|
|
variable VAR. Subexpressions are numbered in order of their
|
|
opening parentheses starting from '1'. NUMBER defaults to '1'.
|
|
|
|
16.3.63 rmmod
|
|
-------------
|
|
|
|
-- Command: rmmod module
|
|
Remove a loaded MODULE.
|
|
|
|
16.3.64 save_env
|
|
----------------
|
|
|
|
-- Command: save_env ['--file' file] var ...
|
|
Save the named variables from the environment to the environment
|
|
block file. *Note Environment block::.
|
|
|
|
The '--file' option overrides the default location of the
|
|
environment block.
|
|
|
|
This command will operate successfully even when environment
|
|
variable 'check_signatures' is set to 'enforce' (*note
|
|
check_signatures::), since it writes to disk and does not alter the
|
|
behavior of GRUB based on any contents of disk that have been read.
|
|
It is possible to modify a digitally signed environment block file
|
|
from within GRUB using this command, such that its signature will
|
|
no longer be valid on subsequent boots. Care should be taken in
|
|
such advanced configurations to avoid rendering the system
|
|
unbootable. *Note Using digital signatures::, for more
|
|
information.
|
|
|
|
16.3.65 search
|
|
--------------
|
|
|
|
-- Command: search ['--file'|'--label'|'--fs-uuid'] ['--set' [var]]
|
|
['--no-floppy'] name
|
|
Search devices by file ('-f', '--file'), filesystem label ('-l',
|
|
'--label'), or filesystem UUID ('-u', '--fs-uuid').
|
|
|
|
If the '--set' option is used, the first device found is set as the
|
|
value of environment variable VAR. The default variable is 'root'.
|
|
|
|
The '--no-floppy' option prevents searching floppy devices, which
|
|
can be slow.
|
|
|
|
The 'search.file', 'search.fs_label', and 'search.fs_uuid' commands
|
|
are aliases for 'search --file', 'search --label', and 'search
|
|
--fs-uuid' respectively.
|
|
|
|
16.3.66 sendkey
|
|
---------------
|
|
|
|
-- Command: sendkey
|
|
['--num'|'--caps'|'--scroll'|'--insert'|'--pause'|'--left-shift'|'--right-shift'|'--sysrq'|'--numkey'|'--capskey'|'--scrollkey'|'--insertkey'|'--left-alt'|'--right-alt'|'--left-ctrl'|'--right-ctrl'
|
|
'on'|'off']... ['no-led'] keystroke
|
|
Insert keystrokes into the keyboard buffer when booting. Sometimes
|
|
an operating system or chainloaded boot loader requires particular
|
|
keys to be pressed: for example, one might need to press a
|
|
particular key to enter "safe mode", or when chainloading another
|
|
boot loader one might send keystrokes to it to navigate its menu.
|
|
|
|
You may provide up to 16 keystrokes (the length of the BIOS
|
|
keyboard buffer). Keystroke names may be upper-case or lower-case
|
|
letters, digits, or taken from the following table:
|
|
|
|
Name Key
|
|
-------------------------------------------------------------------
|
|
escape Escape
|
|
exclam !
|
|
at @
|
|
numbersign #
|
|
dollar $
|
|
percent %
|
|
caret ^
|
|
ampersand &
|
|
asterisk *
|
|
parenleft (
|
|
parenright )
|
|
minus -
|
|
underscore _
|
|
equal =
|
|
plus +
|
|
backspace Backspace
|
|
tab Tab
|
|
bracketleft [
|
|
braceleft {
|
|
bracketright ]
|
|
braceright }
|
|
enter Enter
|
|
control press and release Control
|
|
semicolon ;
|
|
colon :
|
|
quote '
|
|
doublequote "
|
|
backquote '
|
|
tilde ~
|
|
shift press and release left Shift
|
|
backslash \
|
|
bar |
|
|
comma ,
|
|
less <
|
|
period .
|
|
greater >
|
|
slash /
|
|
question ?
|
|
rshift press and release right Shift
|
|
alt press and release Alt
|
|
space space bar
|
|
capslock Caps Lock
|
|
F1 F1
|
|
F2 F2
|
|
F3 F3
|
|
F4 F4
|
|
F5 F5
|
|
F6 F6
|
|
F7 F7
|
|
F8 F8
|
|
F9 F9
|
|
F10 F10
|
|
F11 F11
|
|
F12 F12
|
|
num1 1 (numeric keypad)
|
|
num2 2 (numeric keypad)
|
|
num3 3 (numeric keypad)
|
|
num4 4 (numeric keypad)
|
|
num5 5 (numeric keypad)
|
|
num6 6 (numeric keypad)
|
|
num7 7 (numeric keypad)
|
|
num8 8 (numeric keypad)
|
|
num9 9 (numeric keypad)
|
|
num0 0 (numeric keypad)
|
|
numperiod . (numeric keypad)
|
|
numend End (numeric keypad)
|
|
numdown Down (numeric keypad)
|
|
numpgdown Page Down (numeric keypad)
|
|
numleft Left (numeric keypad)
|
|
numcenter 5 with Num Lock inactive (numeric
|
|
keypad)
|
|
numright Right (numeric keypad)
|
|
numhome Home (numeric keypad)
|
|
numup Up (numeric keypad)
|
|
numpgup Page Up (numeric keypad)
|
|
numinsert Insert (numeric keypad)
|
|
numdelete Delete (numeric keypad)
|
|
numasterisk * (numeric keypad)
|
|
numminus - (numeric keypad)
|
|
numplus + (numeric keypad)
|
|
numslash / (numeric keypad)
|
|
numenter Enter (numeric keypad)
|
|
delete Delete
|
|
insert Insert
|
|
home Home
|
|
end End
|
|
pgdown Page Down
|
|
pgup Page Up
|
|
down Down
|
|
up Up
|
|
left Left
|
|
right Right
|
|
|
|
As well as keystrokes, the 'sendkey' command takes various options
|
|
that affect the BIOS keyboard status flags. These options take an
|
|
'on' or 'off' parameter, specifying that the corresponding status
|
|
flag be set or unset; omitting the option for a given status flag
|
|
will leave that flag at its initial state at boot. The '--num',
|
|
'--caps', '--scroll', and '--insert' options emulate setting the
|
|
corresponding mode, while the '--numkey', '--capskey',
|
|
'--scrollkey', and '--insertkey' options emulate pressing and
|
|
holding the corresponding key. The other status flag options are
|
|
self-explanatory.
|
|
|
|
If the '--no-led' option is given, the status flag options will
|
|
have no effect on keyboard LEDs.
|
|
|
|
If the 'sendkey' command is given multiple times, then only the
|
|
last invocation has any effect.
|
|
|
|
Since 'sendkey' manipulates the BIOS keyboard buffer, it may cause
|
|
hangs, reboots, or other misbehaviour on some systems. If the
|
|
operating system or boot loader that runs after GRUB uses its own
|
|
keyboard driver rather than the BIOS keyboard functions, then
|
|
'sendkey' will have no effect.
|
|
|
|
This command is only available on PC BIOS systems.
|
|
|
|
16.3.67 set
|
|
-----------
|
|
|
|
-- Command: set [envvar=value]
|
|
Set the environment variable ENVVAR to VALUE. If invoked with no
|
|
arguments, print all environment variables with their values.
|
|
|
|
16.3.68 sha1sum
|
|
---------------
|
|
|
|
-- Command: sha1sum arg ...
|
|
Alias for 'hashsum --hash sha1 arg ...'. See command 'hashsum'
|
|
(*note hashsum::) for full description.
|
|
|
|
16.3.69 sha256sum
|
|
-----------------
|
|
|
|
-- Command: sha256sum arg ...
|
|
Alias for 'hashsum --hash sha256 arg ...'. See command 'hashsum'
|
|
(*note hashsum::) for full description.
|
|
|
|
16.3.70 sha512sum
|
|
-----------------
|
|
|
|
-- Command: sha512sum arg ...
|
|
Alias for 'hashsum --hash sha512 arg ...'. See command 'hashsum'
|
|
(*note hashsum::) for full description.
|
|
|
|
16.3.71 sleep
|
|
-------------
|
|
|
|
-- Command: sleep ['--verbose'] ['--interruptible'] count
|
|
Sleep for COUNT seconds. If option '--interruptible' is given,
|
|
allow <ESC> to interrupt sleep. With '--verbose' show countdown of
|
|
remaining seconds. Exit code is set to 0 if timeout expired and to
|
|
1 if timeout was interrupted by <ESC>.
|
|
|
|
16.3.72 source
|
|
--------------
|
|
|
|
-- Command: source file
|
|
Read FILE as a configuration file, as if its contents had been
|
|
incorporated directly into the sourcing file. Unlike 'configfile'
|
|
(*note configfile::), this executes the contents of FILE without
|
|
changing context: any environment variable changes made by the
|
|
commands in FILE will be preserved after 'source' returns, and the
|
|
menu will not be shown immediately.
|
|
|
|
16.3.73 test
|
|
------------
|
|
|
|
-- Command: test expression
|
|
Evaluate EXPRESSION and return zero exit status if result is true,
|
|
non zero status otherwise.
|
|
|
|
EXPRESSION is one of:
|
|
|
|
STRING1 '==' STRING2
|
|
the strings are equal
|
|
STRING1 '!=' STRING2
|
|
the strings are not equal
|
|
STRING1 '<' STRING2
|
|
STRING1 is lexicographically less than STRING2
|
|
STRING1 '<=' STRING2
|
|
STRING1 is lexicographically less or equal than STRING2
|
|
STRING1 '>' STRING2
|
|
STRING1 is lexicographically greater than STRING2
|
|
STRING1 '>=' STRING2
|
|
STRING1 is lexicographically greater or equal than STRING2
|
|
INTEGER1 '-eq' INTEGER2
|
|
INTEGER1 is equal to INTEGER2
|
|
INTEGER1 '-ge' INTEGER2
|
|
INTEGER1 is greater than or equal to INTEGER2
|
|
INTEGER1 '-gt' INTEGER2
|
|
INTEGER1 is greater than INTEGER2
|
|
INTEGER1 '-le' INTEGER2
|
|
INTEGER1 is less than or equal to INTEGER2
|
|
INTEGER1 '-lt' INTEGER2
|
|
INTEGER1 is less than INTEGER2
|
|
INTEGER1 '-ne' INTEGER2
|
|
INTEGER1 is not equal to INTEGER2
|
|
PREFIXINTEGER1 '-pgt' PREFIXINTEGER2
|
|
INTEGER1 is greater than INTEGER2 after stripping off common
|
|
non-numeric PREFIX.
|
|
PREFIXINTEGER1 '-plt' PREFIXINTEGER2
|
|
INTEGER1 is less than INTEGER2 after stripping off common
|
|
non-numeric PREFIX.
|
|
FILE1 '-nt' FILE2
|
|
FILE1 is newer than FILE2 (modification time). Optionally
|
|
numeric BIAS may be directly appended to '-nt' in which case
|
|
it is added to the first file modification time.
|
|
FILE1 '-ot' FILE2
|
|
FILE1 is older than FILE2 (modification time). Optionally
|
|
numeric BIAS may be directly appended to '-ot' in which case
|
|
it is added to the first file modification time.
|
|
'-d' FILE
|
|
FILE exists and is a directory
|
|
'-e' FILE
|
|
FILE exists
|
|
'-f' FILE
|
|
FILE exists and is not a directory
|
|
'-s' FILE
|
|
FILE exists and has a size greater than zero
|
|
'-n' STRING
|
|
the length of STRING is nonzero
|
|
STRING
|
|
STRING is equivalent to '-n STRING'
|
|
'-z' STRING
|
|
the length of STRING is zero
|
|
'(' EXPRESSION ')'
|
|
EXPRESSION is true
|
|
'!' EXPRESSION
|
|
EXPRESSION is false
|
|
EXPRESSION1 '-a' EXPRESSION2
|
|
both EXPRESSION1 and EXPRESSION2 are true
|
|
EXPRESSION1 EXPRESSION2
|
|
both EXPRESSION1 and EXPRESSION2 are true. This syntax is not
|
|
POSIX-compliant and is not recommended.
|
|
EXPRESSION1 '-o' EXPRESSION2
|
|
either EXPRESSION1 or EXPRESSION2 is true
|
|
|
|
16.3.74 true
|
|
------------
|
|
|
|
-- Command: true
|
|
Do nothing, successfully. This is mainly useful in control
|
|
constructs such as 'if' and 'while' (*note Shell-like scripting::).
|
|
|
|
16.3.75 trust
|
|
-------------
|
|
|
|
-- Command: trust ['--skip-sig'] pubkey_file
|
|
Read public key from PUBKEY_FILE and add it to GRUB's internal list
|
|
of trusted public keys. These keys are used to validate digital
|
|
signatures when environment variable 'check_signatures' is set to
|
|
'enforce'. Note that if 'check_signatures' is set to 'enforce'
|
|
when 'trust' executes, then PUBKEY_FILE must itself be properly
|
|
signed. The '--skip-sig' option can be used to disable
|
|
signature-checking when reading PUBKEY_FILE itself. It is expected
|
|
that '--skip-sig' is useful for testing and manual booting. *Note
|
|
Using digital signatures::, for more information.
|
|
|
|
16.3.76 unset
|
|
-------------
|
|
|
|
-- Command: unset envvar
|
|
Unset the environment variable ENVVAR.
|
|
|
|
16.3.77 uppermem
|
|
----------------
|
|
|
|
This command is not yet implemented for GRUB 2, although it is planned.
|
|
|
|
16.3.78 verify_detached
|
|
-----------------------
|
|
|
|
-- Command: verify_detached ['--skip-sig'] file signature_file
|
|
[pubkey_file]
|
|
Verifies a GPG-style detached signature, where the signed file is
|
|
FILE, and the signature itself is in file SIGNATURE_FILE.
|
|
Optionally, a specific public key to use can be specified using
|
|
PUBKEY_FILE. When environment variable 'check_signatures' is set
|
|
to 'enforce', then PUBKEY_FILE must itself be properly signed by an
|
|
already-trusted key. An unsigned PUBKEY_FILE can be loaded by
|
|
specifying '--skip-sig'. If PUBKEY_FILE is omitted, then public
|
|
keys from GRUB's trusted keys (*note list_trusted::, *note trust::,
|
|
and *note distrust::) are tried.
|
|
|
|
Exit code '$?' is set to 0 if the signature validates successfully.
|
|
If validation fails, it is set to a non-zero value. *Note Using
|
|
digital signatures::, for more information.
|
|
|
|
16.3.79 videoinfo
|
|
-----------------
|
|
|
|
-- Command: videoinfo [[WxH]xD]
|
|
List available video modes. If resolution is given, show only
|
|
matching modes.
|
|
|
|
16.3.80 wrmsr
|
|
-------------
|
|
|
|
-- Command:: wrmsr 0xADDR 0xVALUE
|
|
Write a 0xVALUE to a model-specific register at address 0xADDR.
|
|
|
|
Please note that on SMP systems, writing to a MSR that has a scope
|
|
per hardware thread, implies that the value that is written only
|
|
applies to the particular cpu/core/thread that runs the command.
|
|
|
|
Also, if you specify a reserved or unimplemented MSR address, it
|
|
will cause a general protection exception (which is not currently
|
|
being handled) and the system will reboot.
|
|
|
|
16.3.81 xen_hypervisor
|
|
----------------------
|
|
|
|
-- Command: xen_hypervisor file [arguments] ...
|
|
Load a Xen hypervisor binary from FILE. The rest of the line is
|
|
passed verbatim as the "kernel command-line". Any other binaries
|
|
must be reloaded after using this command. This command is only
|
|
available on AArch64 systems.
|
|
|
|
16.3.82 xen_module
|
|
------------------
|
|
|
|
-- Command: xen_module [--nounzip] file [arguments]
|
|
Load a module for xen hypervisor at the booting process of xen.
|
|
The rest of the line is passed verbatim as the module command line.
|
|
Modules should be loaded in the following order: - dom0 kernel
|
|
image - dom0 ramdisk if present - XSM policy if present This
|
|
command is only available on AArch64 systems.
|
|
|
|
16.4 The list of networking commands
|
|
====================================
|
|
|
|
16.4.1 net_add_addr
|
|
-------------------
|
|
|
|
-- Command: net_add_addr INTERFACE CARD ADDRESS
|
|
Configure additional network INTERFACE with ADDRESS on a network
|
|
CARD. ADDRESS can be either IP in dotted decimal notation, or
|
|
symbolic name which is resolved using DNS lookup. If successful,
|
|
this command also adds local link routing entry to the default
|
|
subnet of ADDRESS with name INTERFACE':local' via INTERFACE.
|
|
|
|
16.4.2 net_add_dns
|
|
------------------
|
|
|
|
-- Command: net_add_dns SERVER
|
|
Resolve SERVER IP address and add to the list of DNS servers used
|
|
during name lookup.
|
|
|
|
16.4.3 net_add_route
|
|
--------------------
|
|
|
|
-- Command: net_add_route SHORTNAME IP[/PREFIX] [INTERFACE | 'gw'
|
|
GATEWAY]
|
|
Add route to network with address IP as modified by PREFIX via
|
|
either local INTERFACE or GATEWAY. PREFIX is optional and defaults
|
|
to 32 for IPv4 address and 128 for IPv6 address. Route is
|
|
identified by SHORTNAME which can be used to remove it (*note
|
|
net_del_route::).
|
|
|
|
16.4.4 net_bootp
|
|
----------------
|
|
|
|
-- Command: net_bootp [CARD]
|
|
Perform configuration of CARD using DHCP protocol. If no card name
|
|
is specified, try to configure all existing cards. If
|
|
configuration was successful, interface with name CARD':dhcp' and
|
|
configured address is added to CARD. Additionally the following
|
|
DHCP options are recognized and processed:
|
|
|
|
'1 (Subnet Mask)'
|
|
Used to calculate network local routing entry for interface
|
|
CARD':dhcp'.
|
|
'3 (Router)'
|
|
Adds default route entry with the name CARD':dhcp:default' via
|
|
gateway from DHCP option. Note that only option with single
|
|
route is accepted.
|
|
'6 (Domain Name Server)'
|
|
Adds all servers from option value to the list of servers used
|
|
during name resolution.
|
|
'12 (Host Name)'
|
|
Sets environment variable 'net_'<CARD>'_dhcp_hostname' (*note
|
|
net_<INTERFACE>_hostname::) to the value of option.
|
|
'15 (Domain Name)'
|
|
Sets environment variable 'net_'<CARD>'_dhcp_domain' (*note
|
|
net_<INTERFACE>_domain::) to the value of option.
|
|
'17 (Root Path)'
|
|
Sets environment variable 'net_'<CARD>'_dhcp_rootpath' (*note
|
|
net_<INTERFACE>_rootpath::) to the value of option.
|
|
'18 (Extensions Path)'
|
|
Sets environment variable 'net_'<CARD>'_dhcp_extensionspath'
|
|
(*note net_<INTERFACE>_extensionspath::) to the value of
|
|
option.
|
|
|
|
16.4.5 net_del_addr
|
|
-------------------
|
|
|
|
-- Command: net_del_addr INTERFACE
|
|
Remove configured INTERFACE with associated address.
|
|
|
|
16.4.6 net_del_dns
|
|
------------------
|
|
|
|
-- Command: net_del_dns ADDRESS
|
|
Remove ADDRESS from list of servers used during name lookup.
|
|
|
|
16.4.7 net_del_route
|
|
--------------------
|
|
|
|
-- Command: net_del_route SHORTNAME
|
|
Remove route entry identified by SHORTNAME.
|
|
|
|
16.4.8 net_get_dhcp_option
|
|
--------------------------
|
|
|
|
-- Command: net_get_dhcp_option VAR INTERFACE NUMBER TYPE
|
|
Request DHCP option NUMBER of TYPE via INTERFACE. TYPE can be one
|
|
of 'string', 'number' or 'hex'. If option is found, assign its
|
|
value to variable VAR. Values of types 'number' and 'hex' are
|
|
converted to string representation.
|
|
|
|
16.4.9 net_ipv6_autoconf
|
|
------------------------
|
|
|
|
-- Command: net_ipv6_autoconf [CARD]
|
|
Perform IPv6 autoconfiguration by adding to the CARD interface with
|
|
name CARD':link' and link local MAC-based address. If no card is
|
|
specified, perform autoconfiguration for all existing cards.
|
|
|
|
16.4.10 net_ls_addr
|
|
-------------------
|
|
|
|
-- Command: net_ls_addr
|
|
List all configured interfaces with their MAC and IP addresses.
|
|
|
|
16.4.11 net_ls_cards
|
|
--------------------
|
|
|
|
-- Command: net_ls_cards
|
|
List all detected network cards with their MAC address.
|
|
|
|
16.4.12 net_ls_dns
|
|
------------------
|
|
|
|
-- Command: net_ls_dns
|
|
List addresses of DNS servers used during name lookup.
|
|
|
|
16.4.13 net_ls_routes
|
|
---------------------
|
|
|
|
-- Command: net_ls_routes
|
|
List routing entries.
|
|
|
|
16.4.14 net_nslookup
|
|
--------------------
|
|
|
|
-- Command: net_nslookup NAME [SERVER]
|
|
Resolve address of NAME using DNS server SERVER. If no server is
|
|
given, use default list of servers.
|
|
|