change the default boot kernel on a headless server

[drknut]

Since the 7.6 update, I have a problem (more on this in another topic when I have enough info to post).

I want to make sure that the new kernel is the culprit. So I'd like to boot with the last 7.5 kernel.

The problem is that I have no boot menu (no display, no keyboard), and grub configuration is far away from my comfort zone.

Could somebody point me to a "how to" ?

TIA

[stevemowbray]

grubby is a command line program for manipulating the grub config, you want the --set-default option.

[drknut]

done !

Code: Select all

uname -r
3.10.0-862.9.1.el7.x86_64 

thank you very much for your help.