[SOLVED] Reboot linux without resetting machine (i.e. BIOS POST, GRUB etc.)

10110111 · 12-09-2008, 03:45 PM

How can i reboot linux without need to pass POST, using GRUB, just reload kernel (or load another one)?

indienick · 12-09-2008, 03:50 PM

If you are switching kernels, you will need to reboot the machine as the running kernel gets loaded by GRUB.

However, you should not - ideally - need to reboot, as you can dynamically modify the kernel through "rmmod", "modprobe", etc., and issuing various runlevels through "telinit".

syg00 · 12-09-2008, 03:50 PM

kexec can do most of what you want - needs a fair bit of setting up in advance. Last I looked the documentation was average - at best.

pixellany · 12-09-2008, 03:58 PM

Depending on what you are doing, I would think that running "init 3" (single user), followed by "init 5" (the normal GUI runlevel) would reset most things.
For some issues, all you have to do is restart X (ctrl-alt-backspace).

10110111 · 12-09-2008, 04:17 PM

Quote:

Depending on what you are doing

I just need to restart kernel after i enable some features which cannot be compiled as modules.

Quote:

kexec can do most of what you want

It seems to be what i need... now reading...