GRUBBY(8)						      System Manager's Manual							 GRUBBY(8)

NAME

       grubby - command line tool for configuring grub, lilo, and elilo

SYNOPSIS

       grubby [--add-kernel=kernel-path] [--args=args]
	      [--bad-image-okay] [--boot-filesystem=bootfs]
	      [--bootloader-probe] [--config-file path]
	      [--copy-default] [--default-kernel] [--grub]
	      [--info=kernel-path] [--initrd=initrd-path]
	      [--lilo] [--make-default] [-o path]
	      [--remove-kernel=kernel-path]
	      [--set-default=kernel-path] [--title=entry-title]

DESCRIPTION

       grubby  is  a command line tool for updating and displaying information about the configuration files for the grub, lilo, elilo (ia64), and
       yaboot (powerpc) boot loaders. It is primarily designed to be used from scripts which install new kernels  and  need  to  find  information
       about the current boot environment.

       On  Intel  x86  platforms,  grub  is the default bootloader and the configuration file is in /boot/grub/grub.conf. On Intel ia64 platforms,
       elilo mode is used and the default location for the configuration file is /boot/grub/grub.conf. On PowerPC  platforms,  yaboot  parsing	is
       used and the configuration file should be in /etc/yaboot.conf.

       There are a number of ways to specify the kernel used for --info, --remove-kernel, and --update-kernel. Specificying DEFAULT or ALL selects
       the default entry and all of the entries, respectively.	If a comma separated list of numbers is given, the boot entries indexed  by  those
       numbers are selected. Finally, the title of a boot entry may be specified by using TITLE=title as the argument; all entries with that title
       are used.

OPTIONS

       --add-kernel=kernel-path
	      Add a new boot entry for the kernel located at kernel-path.

       --args=kernel-args
	      When a new kernel is added, this specifies the command line arguments which should be passed to the kernel by default (note they are
	      merged  with the arguments from the template if --copy-default is used).	When --update-kernel is used, this specifies new arguments
	      to add to the argument list. Multiple, space separated arguments may be used. If an argument already exists the new  value  replaces
	      the  old	values.  The root= kernel argument gets special handling if the configuration file has special handling for specifying the
	      root filesystem (like lilo.conf does).

       --bad-image-okay
	      When grubby is looking for a entry to use for something (such as a template or a default boot entry) it uses sanity checks, such	as
	      ensuring that the kernel exists in the filesystem, to make sure entries that obviously won't work aren't selected. This option over-
	      rides that behavior, and is designed primarily for testing.

       --boot-filesystem=bootfs
	      The grub boot loader expects file paths listed in it's configuration path to be relative to the top of the filesystem they  are  on,
	      rather  then relative to the current root filesystem. By default grubby searches the list of currently mounted filesystems to deter-
	      mine this. If this option is given grubby acts as if the specified filesystem was the filesystem containing the kernel (this  option
	      is designed primarily for testing).

       --bootloader-probe
	      grubby tries to determine if grub or lilo is currently installed. When one of those bootloaders is found the name of that bootloader
	      is displayed on stdout.  Both could be installed (on different devices), and grubby will print out the names  of	both  bootloaders,
	      one  per	line. The probe for grub requires a commented out boot directive grub.conf identical to the standard directive in the lilo
	      configuration file. If this is not present grubby will assume grub is not installed (note that anaconda  places  this  directive	in
	      grub.conf files it creates).  This option is only available on ia32 platforms.

       --config-file=path
	      Use path as the configuration file rather then the default.

       --copy-default
	      grubby  will  copy  as  much information (such as kernel arguments and root device) as possible from the current default kernel. The
	      kernel path and initrd path will never be copied.

       --default-kernel
	      Display the full path to the current default kernel and exit.

       --elilo
	      Use an elilo style configuration file.

       --grub Use a grub style configuration file instead of lilo style. This is the default on ia32 platforms.

       --info=kernel-path
	      Display information on all boot entries which match kernel-path. I

       --initrd=initrd-path
	      Use initrd-path as the path to an initial ram disk for a new kernel being added.

       --lilo Use a lilo style configuration file.

       --make-default
	      Make the new kernel entry being added the default entry.

       --remove-args=kernel-args
	      The arguments specified by kernel-args are removed from the kernels specified by --update-kernel. The  root  argument  gets  special
	      handling for configuration files that support separate root filesystem configuration.

       --remove-kernel=kernel-path
	      Removes all boot entries which match kernel-path. This may be used along with --add-kernel, in which case the new kernel being added
	      will never be removed.

       --set-default=kernel-path
	      The first entry which boots the specified kernel is made the default boot entry.

       --title=entry-title
	      When a new kernel entry is added entry-title is used as the title (lilo label) for the entry. If entry-title is longer then  maximum
	      length allowed by the bootloader (15 for lilo, unlimited for grub and elilo) the title is shortened to a (unique) entry.

       --update-kernel=kernel-path
	      The  entries for kernels matching kernel-path are updated. Currently the only items that can be updated is the kernel argument list,
	      which is modified via the --args and --remove-args options.

       --version
	      Display the version of grubby being run and then exit immediately.

       --yaboot
	      Use an yaboot style configuration file.

BUGS

       The command line syntax is more then a little baroque. This probably won't be fixed as grubby is only intended  to  be  called  from  shell
       scripts which can get it right.

SEE ALSO

       grub(8), lilo(8), yaboot(8), mkinitrd(8)

AUTHOR

       Erik Troan <ewt@redhat.com>

4th Berkeley Distribution					  Thu Jun 21 2002							 GRUBBY(8)