systemctl-kexec

Fast kexec reboot

$ systemctl kexec

$ systemctl kexec -f

systemctl kexec [OPTIONS]

systemctl kexec reboots the system using kexec, which loads and boots directly into a new kernel without going through BIOS/UEFI firmware. This provides significantly faster reboots by skipping hardware initialization.
A kernel must be pre-loaded using the `kexec` command before this works. If no kernel is loaded, the command fails unless `--force` is used.

-f, --force

Fall back to normal reboot if kexec not available

Requires a kernel to be pre-loaded with `kexec -l`. Skips firmware initialization, which may cause issues with some hardware. Not all hardware supports kexec reliably. May not work with secure boot enabled.

The kexec subcommand integrates the Linux kexec facility with systemd's shutdown process, enabling fast reboots in environments where boot time is critical.

systemctl-reboot(1), kexec(8)