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Quickly (soft-)reboot skipping hardware checks

Terminal - Quickly (soft-)reboot skipping hardware checks
/sbin/kexec -l /boot/$KERNEL --append="$KERNELPARAMTERS" --initrd=/boot/$INITRD; sync; /sbin/kexec -e
2009-08-03 07:36:49
User: olorin
21
Quickly (soft-)reboot skipping hardware checks

If you are doing some tests which require reboots (e. g. startup skripts, kernel module parameters, ...), this is very time intensive, if you have got a hardware with a long pre-boot phase due to hardware checks.

At this time, kexec can help, which only restarts the kernel with all related stuff.

First the kernel to be started is loaded, then kexec -e jumps up to start it.

Is as hard as a reboot -f, but several times faster (e. g. 1 Minute instead of 12 on some servers here).

Alternatives

There are 5 alternatives - vote for the best!

Terminal - Alternatives

Know a better way?

If you can do better, submit your command here.

What others think

Very sexy command !

Useful after kernel upgrade.

Comment by GouNiNi 369 weeks and 1 day ago

This should get you rebooted with the same kernel and parameters that you're running with now:

kexec -l /boot/vmlinuz-$(uname -r) --append="$(dmesg | fgrep -m 1 'Command line' | cut -f2- -d:)" --initrd=/boot/initrd.img-$(uname -r) && sync && kexec -e
Comment by HorsePunchKid 368 weeks and 4 days ago

Your point of view

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