Le 26/08/2025 à 16:52, wirelessduck--- via Dng a écrit :
> Does kexec allow you to avoid a reboot after updating kernel?

    You don't need to reboot after kernel upgrade. The new kernel is
loaded on next reboot, but the previous one remains perfectly
functionnal; it just lacks the latest refinement or security fix which
you are most often not concerned with.

    Yes, you may want to reboot mmediately a server that's critical and
exposed. But I'd never reboot a desktop or laptop for that. Actually I
reboot them often because I use to shut them off everytime I've done
using them, say at night. Halt happens in a few seconds and start-up in
less than 30s, which makes sleeping modes totally useless, at least for
me, also a huge difference with Winzoze.

    Never used kexec. I bet it's usefull on servers for which the BIOS
takes minutes.

--     Didier