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=== Installation ===
=== Installation ===
{{Codeline|# mount /boot}}
{{Root|mount /boot}}


Install grub after mounting /boot.
Install grub after mounting /boot.


{{Codeline|# grub-mkconfig -o /boot/grub/grub.cfg}}
{{Root|grub-mkconfig -o /boot/grub/grub.cfg}}


Standard installation:
Standard installation:


{{Codeline|# grub-install --recheck --no-floppy /dev/sda}}
{{Root|grub-install --recheck --no-floppy /dev/sda}}


HP Server /dev/cciss installation:
HP Server /dev/cciss installation:


{{Codeline|# grub-install --recheck --no-floppy /dev/cciss/c0d0}}
{{Root|grub-install --recheck --no-floppy /dev/cciss/c0d0}}


/sbin/grub-setup: warn: Your embedding area is unusually small.  core.img won't fit in it..
/sbin/grub-setup: warn: Your embedding area is unusually small.  core.img won't fit in it..
Line 26: Line 26:
/sbin/grub-setup: error: will not proceed with blocklists.
/sbin/grub-setup: error: will not proceed with blocklists.


{{Codeline|# grub-install --recheck --no-floppy /dev/cciss/c0d0 --force}}
{{Root|grub-install --recheck --no-floppy /dev/cciss/c0d0 --force}}


/sbin/grub-setup: warn: Your embedding area is unusually small.  core.img won't fit in it..
/sbin/grub-setup: warn: Your embedding area is unusually small.  core.img won't fit in it..
Line 32: Line 32:
Installation finished. No error reported.
Installation finished. No error reported.


{{Codeline|# umount /boot}}
{{Root|umount /boot}}




Line 120: Line 120:
=== Updating Grub 2 ===
=== Updating Grub 2 ===


{{Codeline|# mount /boot}}
{{Root|mount /boot}}


{{Codeline|# grub-install --recheck --no-floppy /dev/sda}}
{{Root|grub-install --recheck --no-floppy /dev/sda}}


{{Codeline|# umount /boot}}
{{Root|umount /boot}}
 
=== Serial Console ===
 
{{File|/etc/default/grub|
GRUB_TERMINAL=serial
GRUB_SERIAL=COMMAND="serial --unit=0 --speed=57600 --word=8 --parity=no --stop=1"
GRUB_CMDLINE_LINUX_DEFAULT="console=tty0 console=ttyS0,57600"
</pre>
}}
 
{{Warning|Running the following command will overwrite any changes in grub.cfg you manually made}}
 
Mount /boot and run {{Root|grub-mkconfig -o /boot/grub/grub.cfg}}

Revision as of 17:13, 27 July 2011

GRUB 2

Packages

Exherbo: sys-boot/grub

Gentoo: sys-boot/grub

Installation

# mount /boot

Install grub after mounting /boot.

# grub-mkconfig -o /boot/grub/grub.cfg

Standard installation:

# grub-install --recheck --no-floppy /dev/sda

HP Server /dev/cciss installation:

# grub-install --recheck --no-floppy /dev/cciss/c0d0

/sbin/grub-setup: warn: Your embedding area is unusually small. core.img won't fit in it.. /sbin/grub-setup: warn: Embedding is not possible. GRUB can only be installed in this setup by using blocklists. However, blocklists are UNRELIABLE and their use is discouraged.. /sbin/grub-setup: error: will not proceed with blocklists.

# grub-install --recheck --no-floppy /dev/cciss/c0d0 --force

/sbin/grub-setup: warn: Your embedding area is unusually small. core.img won't fit in it.. /sbin/grub-setup: warn: Embedding is not possible. GRUB can only be installed in this setup by using blocklists. However, blocklists are UNRELIABLE and their use is discouraged.. Installation finished. No error reported.

# umount /boot


Configuration

Standard

### BEGIN /etc/grub.d/10_linux ###
menuentry "Gentoo GNU/Linux" --class gentoo --class gnu-linux --class gnu --class os {
        set gfxpayload=keep
        insmod ext2
        set root='(hd0,1)'
        search --no-floppy --fs-uuid --set ba16bd87-842c-46c2-a487-2a27d9be90dd
        echo    Loading Linux ...
        linux   /vmlinuz root=/dev/sda3 ro
}
menuentry "Gentoo GNU/Linux (recovery mode)" --class gentoo --class gnu-linux --class gnu --class os {
        set gfxpayload=keep
        insmod ext2
        set root='(hd0,1)'
        search --no-floppy --fs-uuid --set ba16bd87-842c-46c2-a487-2a27d9be90dd
        echo    Loading Linux ...
        linux   /vmlinuz root=/dev/sda3 ro single
}
menuentry "Gentoo GNU/Linux, previous kernel" --class gentoo --class gnu-linux --class gnu --class os {
        set gfxpayload=keep
        insmod ext2
        set root='(hd0,1)'
        search --no-floppy --fs-uuid --set ba16bd87-842c-46c2-a487-2a27d9be90dd
        echo    Loading Linux ...
        linux   /vmlinuz root=/dev/sda3 ro
}
menuentry "Gentoo GNU/Linux, previous kernel (recovery mode)" --class gentoo --class gnu-linux --class gnu --class os {
        set gfxpayload=keep
        insmod ext2
        set root='(hd0,1)'
        search --no-floppy --fs-uuid --set ba16bd87-842c-46c2-a487-2a27d9be90dd
        echo    Loading Linux ...
        linux   /vmlinuz root=/dev/sda3 ro single
}
### END /etc/grub.d/10_linux ###

cciss

### BEGIN /etc/grub.d/10_linux ###
menuentry 'Gentoo GNU/Linux' --class gentoo --class gnu-linux --class gnu --class os {
        load_video
        insmod part_msdos
        insmod ext2
        set root='(hd0,msdos1)'
        search --no-floppy --fs-uuid --set=root b3727853-ae78-4a00-b21c-7b974c233e1c
        echo    'Loading Linux ...'
        linux   /vmlinuzo root=/dev/cciss/c0d0p3 ro
}
menuentry 'Gentoo GNU/Linux (recovery mode)' --class gentoo --class gnu-linux --class gnu --class os {
        load_video
        insmod part_msdos
        insmod ext2
        set root='(hd0,msdos1)'
        search --no-floppy --fs-uuid --set=root b3727853-ae78-4a00-b21c-7b974c233e1c
        echo    'Loading Linux ...'
        linux   /vmlinuz root=/dev/cciss/c0d0p3 ro single
}
menuentry 'Gentoo GNU/Linux, previous kernel' --class gentoo --class gnu-linux --class gnu --class os {
        load_video
        insmod part_msdos
        insmod ext2
        set root='(hd0,msdos1)'
        search --no-floppy --fs-uuid --set=root b3727853-ae78-4a00-b21c-7b974c233e1c
        echo    'Loading Linux ...'
        linux   /vmlinuz.old root=/dev/cciss/c0d0p3 ro
}
menuentry 'Gentoo GNU/Linux, previous kernel (recovery mode)' --class gentoo --class gnu-linux --class gnu --class os {
        load_video
        insmod part_msdos
        insmod ext2
        set root='(hd0,msdos1)'
        search --no-floppy --fs-uuid --set=root b3727853-ae78-4a00-b21c-7b974c233e1c
        echo    'Loading Linux ...'
        linux   /vmlinuz.old root=/dev/cciss/c0d0p3 ro single
}
### END /etc/grub.d/10_linux ###


Updating Grub 2

# mount /boot
# grub-install --recheck --no-floppy /dev/sda
# umount /boot

Serial Console

File: /etc/default/grub
{{{2}}}
Warning: Running the following command will overwrite any changes in grub.cfg you manually made

Mount /boot and run

# grub-mkconfig -o /boot/grub/grub.cfg
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