grub: Invoking grub-install
23 Invoking grub-install
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The program 'grub-install' generates a GRUB core image using
'grub-mkimage' and installs it on your system. You must specify the
device name on which you want to install GRUB, like this:
grub-install INSTALL_DEVICE
The device name INSTALL_DEVICE is an OS device name or a GRUB device
name.
'grub-install' accepts the following options:
'--help'
Print a summary of the command-line options and exit.
'--version'
Print the version number of GRUB and exit.
'--boot-directory=DIR'
Install GRUB images under the directory 'DIR/grub/' This option is
useful when you want to install GRUB into a separate partition or a
removable disk. If this option is not specified then it defaults
to '/boot', so
grub-install /dev/sda
is equivalent to
grub-install --boot-directory=/boot/ /dev/sda
Here is an example in which you have a separate "boot" partition
which is mounted on '/mnt/boot':
grub-install --boot-directory=/mnt/boot /dev/sdb
'--recheck'
Recheck the device map, even if '/boot/grub/device.map' already
exists. You should use this option whenever you add/remove a disk
into/from your computer.
'--no-rs-codes'
By default on x86 BIOS systems, 'grub-install' will use some extra
space in the bootloader embedding area for Reed-Solomon
error-correcting codes. This enables GRUB to still boot
successfully if some blocks are corrupted. The exact amount of
protection offered is dependent on available space in the embedding
area. R sectors of redundancy can tolerate up to R/2 corrupted
sectors. This redundancy may be cumbersome if attempting to
cryptographically validate the contents of the bootloader embedding
area, or in more modern systems with GPT-style partition tables
(⇒BIOS installation) where GRUB does not reside in any
unpartitioned space outside of the MBR. Disable the Reed-Solomon
codes with this option.
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grub: Invoking grub-mkconfig