1. Legacy GRUB
If you are using the old legacy grub you can edit menu.lst directly or by using
yast2 bootloader.
When you are log in as a normal user open up a terminal and run.
- su root -c'grep -i silent --colour=auto /boot/grub/menu.lst'
Enter the root's password and you should see the red text that matches the string silent. This is the option the controls what to display during boot up. silent means to show nothing during the boot process you can do a quick edit to it by using perl. As always we need to back up everything we are editing as a good practice.
First backup menu.lst
- su root -c'cp /boot/grub/menu.lst /boot/grub/menu.lst.orig'
To edit that menu.lst file
- su root -c"perl -pi -e 's/silent/verbose/g' /boot/grub/menu.lst"
Since perl is not a file editor a lot of folks will raise some eyebrows about the code above. Ex is an editor so it is prefered over perl. As root run.
- ex -sc "%s/silent/verbose/g|x" /boot/grub/menu.lst
Check if that did the trick run grep again but with the verbose string.
- su root -c'grep -i verbose --colour=auto /boot/grub/menu.lst'
If that will show the verbose string in it then you are successful. You can now reboot and check if it works, well it should but just to be sure.
2. GRUB 2
Menu.lst is replaced by /etc/default/grub if your using grub2. To be able to edit that file you need to be root.
Again backup the files you are editing.
- cp -v /etc/default/grub /etc/default/grub.orig
Edit that file using ex.
- ex -sc "%s/silent/verbose/g|x" /etc/default/grub
- grep -o verbose /etc/default/grub || { echo "It is not verbose." >&2; }
Now backup first /boot/grub2/grub.cfg
- cp -v /boot/grub2/grub2.cfg /boot/grub2/grub2.cfg.orig
To make the changes recognize by grub2 as root run.
- grub2-mkconfig -o /boot/grub2/grub.cfg
For some reason you cannot boot because of some grub error's most probably you did something un intended :-) you need to boot from the live media and mount the partition where your /boot directory resides normally if you did not make a separate boot partition that menu.lst file is in the root partition so it will depend on your partition set up. first moun that partition and then copy that menu.lst back to its original name.
Mount the partition where your menu.lst is located.
- su root -c'mount /dev/sXX /mnt'
Replace XX with the correct value.
Legacy grub.
To restore the original menu.lst file
- su root -c'cp /mnt/boot/grub/menu.lst.orig /mnt/boot/grub/menu.lst'
GRUB2
- cp -v /mnt/etc/default/grub.orig /mnt/etc/default/grub
- cp -v /mnt/boot/grub2/grub2.cfg.orig /mnt/boot/grub2/grub.cfg
Where /mnt is the mount point where your disk is mounted it could be in /media as well but here we choose that directory. umount that root partition and reboot, all should be fine now and start from the beginning.
Happy booting!
Last Edited: Sat Aug 31 07:47:45 PHT 2013
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