Grub2 setup question

[Jamon Camisso]

Madison Kelly wrote:
> Thanks Jamon,
> 
>   I am trying to avoid directly editing files unless that is what I am 
> supposed to do. The reason being that when a new kernel is released now, 
> the grub tools rerun and regenerate the boot.cfg file. I see that there 
> is now an '/etc/grub.d/' directory that I think I am supposed to work with.
> 
>   After sending the email, I came across a doc that said to run 
> 'update-grub2'. When I do this with the CentOS drive connected, it shows 
> it but when I reboot, the entry isn't in grub:

<snip>

> ### BEGIN /etc/grub.d/40_custom ###
> # 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.
> ### END /etc/grub.d/40_custom ###
> ----------------------------------------------
> 
> If I am to add your suggestion directly, where would be safest?

Ah I understand. The Debian (or Grub, I'm not sure) packagers were 
rather prescient and created /etc/grub.d/40_custom for just that 
purpose. Take a look:

jamon at phaedrus: cat /etc/grub.d/40_custom
#!/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.

So try putting your suitable edited Centos menuentry in there:

menuentry "Centos 5.3" {
    insmod ext2
    set root=(hd1,3)
    linux   /boot/vmlinuz-foo root=/dev/sdb3
    initrd  /boot/initrd-foo.img
}

Jamon
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