Is there a way to reboot with a different kernel version from the command line? I have Ubuntu PXE booted on a VM, and there is no graphical interface, but I need to downgrade the kernel (which is installed).
Asked
Active
Viewed 2.2k times
2
-
Are you asking how to reboot or how to install a new kernel? – terdon Mar 20 '15 at 16:28
2 Answers
1
Edit your grub configuration as necessary - if you want to use it for longer, and install the new grub setup then to disk(s).
This I believe will help you understand grub configuration: https://help.ubuntu.com/community/Grub2/Setup
Otherwise I think kexec may also help you.
Install kexec with:
sudo apt-get install kexec-tools
Jacek
- 1,911
- 12
- 10
-
1Please [edit] your answer and explain how the GRUB configuration would be edited and what edits are necessary. As it stands, this is a comment, not an answer. – terdon Mar 20 '15 at 16:28
1
- If you want to one-time reboot selection consider using
grub-rebootcommand; - If you want to set selection permanently use
grub-set-defaultcommand.
Bot these commands require MENU-ITEM as parameter, for listing yours see: How to list GRUB's “menuentries” in command-line?
But, you can always hold Shift while booting, to show Grub Menu, isn't it possible in your VM manager?
-
Makes me think if there is easy way of listing every "menuentry", as greping
grub.cfgdoesn't seem like a good idea. Maybe new question is needed? – madneon Mar 20 '15 at 16:44 -
Question about listing menuentries: http://askubuntu.com/questions/599208/how-to-list-grubs-menuentries-in-command-line – madneon Mar 20 '15 at 16:52