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Old 06-22-2012, 04:59 AM   #1
Registered: Dec 2008
Location: HongKong
Distribution: Fedora/Centos/RedHat
Posts: 115

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Lightbulb Grub2 : Ubuntu, Fedora, OpenBSD

Hi Folks,

I am trying to have tri-boot in my laptop, just after updating the ISO with a clean new install. My previous environment was working just fine with the tri-boot, and I did exact the thing now as before.

I can't figure out why this time is not working.

Could someone maybe spot what is missing, what might be.

Here is how my partition is organized:

Then open to include:

# nano /etc/grub.d/40_custom
exec tail -n +3 $0
menuentry "OpenBSD"
{         set root=(hd0,1)
          chainloader +1
menuentry "Fedora 17" {
        set root=(hd0,2)
        chainloader +1
Saved it. Then run:
# update-grub
Which gives the errors:
/usr/lib/os-probes/mounted/90bsd-distro: 17: /usr/lib/os-probes/mounted/90bsd-distro: gawk: not found
Found unknown Linux distribution on /dev/sda9
error: syntax error.
error: Incorrect command.
error: syntax error.
error: line no: 189
Syntax errors are detected in generated GRUB config file.
Ensure that there are no errors in /etc/default/grub
and /etc/grub.d/* files or please file a bug report with
/boot/grub/ file attached.
The grub2 setup is runing on Ubuntu.

Can someone shed some light on it with any suggestions? All comments are highly welcome!

Last edited by threaderslash; 06-23-2012 at 08:22 AM.
Old 06-22-2012, 10:16 PM   #2
Senior Member
Registered: Jul 2006
Location: Kolkata, India
Distribution: Debian 64-bit GNU/Linux, Kubuntu64, Fedora QA, Slackware,
Posts: 2,766

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install grub2 from Fedora
no custom entries needed except for the openbsd entry.

Known Issue
1 members found this post helpful.
Old 06-22-2012, 11:05 PM   #3
Registered: Sep 2011
Location: Trinidad & Tobago
Distribution: Debian Stretch
Posts: 598

Rep: Reputation: 120Reputation: 120
Try putting single-quotes around your root= parameter:
set root='(hd0,1)'
If that does not help, post your /boot/grub/ file.
Old 06-23-2012, 12:40 AM   #4
Registered: Dec 2008
Location: HongKong
Distribution: Fedora/Centos/RedHat
Posts: 115

Original Poster
Rep: Reputation: 15

Thanks for the suggestions!

Here is what did that worked for me. Hope it can be helpfull for others too.

Switched the grub2 to Fedora, running the ISO DVD > install > upgrade current version. This has restored the grub on FC. With grub on FC, it has recognized Ubuntu automatically, i.e. the dual boot is working now.

Then, the only missing piece was the OpenBSD to get the triboot running. Performing the next steps solved it:

# yum install os-prober
# gedit /etc/grub.d/31_openbsd
In the file 31_openbsd include
#!/bin/sh -e
echo "Adding OpenBSD to GRUB 2 menu"
cat << EOF
menuentry "OpenBSD" {
set root=(hd0,1)
chainloader +1
save the file... then on terminal:

# chmod 777 31_openbsd
# grub2-mkconfig -o /boot/grub2/grub.cfg
Reboot and enjoy your triboot with grub2.


dual-boot, grub 2

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