Modifying Grub2 boot menu

[Member dukester]

sudo fdisk -l

Device          Start        End   Sectors   Size Type
/dev/sda1        2048  976476159 976474112 465.6G Linux filesystem
/dev/sda2   976476160  980672511   4196352     2G Linux swap
/dev/sda3   980672512  980673535      1024   512K FreeBSD boot
/dev/sda4   980673536 1945362423 964688888   460G FreeBSD UFS
/dev/sda5  1945362424 1953525134   8162711   3.9G FreeBSD swap

How do I add FreeBSD to the GRUB2 boot menu? TIA

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dukester

[Moderator caprea]

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Most likely there are users here who dual boot FreeBSD and can give you proven tips.
What I would try in your place is to use the file /etc/grub.d/40_custom for booting and follow more or less these instructions.
https://help.ubuntu.com/community/Grub2%20Other%20Os

[Member dukester]

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Thanks for the link. I had already edited

/etc/grub.d/40_custom

. However, I didn’t know that I had to run

sudo grub-update

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dukester

[Member dukester]

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This worked just dandy:

#!/bin/sh
exec tail -n +3 $0
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.
menuentry "FreeBSD" {
#    insmod ufs2
    set root='(hd0,4)'
    kfreebsd /boot/loader
}

Always do “sudo update-grub” after editing the customization files.

• This reply was modified 2 years, 1 month ago by dukester.
• This reply was modified 2 years, 1 month ago by dukester.

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dukester

[Moderator caprea]

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There’s a typo, it’s sudo update-grub, might fix it.

Thanks for sharing your working solution.

[Member dukester]

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@caprea 👍

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dukester

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