Linux in a Nutshell, Fourth Edition

GRUB Commands

The following sections describe two sets of commands. Both can be used at the GRUB command line. In addition, the first set can be used in the global section of the menu, and the second can be used in individual menu entries. A few commands can be used only on the GRUB shell command line; this is noted in the command entry. The commands default, fallback, hiddenmenu, timeout, and title are available only in the configuration file, for use with the menu interface. They are described in Section 4.3.2.

When running commands, if you find that you aren’t sure how to complete a pathname, you can use the Tab key to find the possible completions. For example:

grub> blocklist (hd0,1)/grub/[Tab]
Possible files are: grub.conf splash.xpm.gz menu.lst device.map stage1 
stage2 e2fs_stage1_5 fat_stage1_5 ffs_stage1_5 jfs_stage1_5 minix_stage1_5 
reiserfs_stage1_5 vstafs_stage1_5 xfs_stage1_5
grub> blocklist (hd0,1)/grub/stage2
(hd0,1)33306+24,33332+231

Command-Line and Global Menu Commands

The commands available at the command line and in the global section of the configuration file are as follows.

Command-Line and Menu Entry Commands

The commands available at the command line and in the individual menu entries of the configuration file are as follows.