A right way to change default kernel?

asked 2015-11-20 16:13:54 -0500

evb0110
21 ●1 ●1 ●4

updated 2015-11-20 16:14:30 -0500

I installed Fedora 22 several weeks ago and some time later updated to 23. Now when I boot I have 5 or 6 available kernels. The default kernel has the word "debug" in its name and as it seems works worse than 23's kernel without "debug". Since I'm a novice I'm looking for a simple and secure solution:

1) How could I change the default kernel to boot without "debug"?

2) Should I delete some of the kernels? What is the "right" way to do it?

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answered 2015-11-20 17:35:16 -0500

sergiomb

3932 ●13 ●65 ●83 http://www.serjux.com/

https://fedoraproject.org/wiki/GRUB_2...

Open /etc/default/grub and ensure this line exists:

GRUB_DEFAULT=saved

and ensure this line not exists:

GRUB_SAVEDEFAULT=true

or ensure this line exists:

GRUB_SAVEDEFAULT=false

grep -P "submenu|^menuentry" /boot/grub2/grub.cfg | cut -d "'" -f2

grub2-mkconfig -o /boot/grub2/grub.cfg

grub2-set-default "<submenu title><menu entry title>"