kexec reboot helper for Ubuntu

reboot

#!/bin/bash

# Store at /usr/local/sbin/reboot with 755 permission

echo ""
echo "Using kexec for faster reboot."
echo ""
echo "If you want to perform a full reboot,"
echo "use 'systemctl reboot' instead."
echo ""

sudo kexec \
    -l $(ls /boot/vmlinuz-* | sort -V | tail -n1) \
    --initrd=$(ls /boot/vmlinuz-* | sort -V | tail -n1 | sed s/vmlinuz/initrd.img/g) \
    --reuse-cmdline && sudo systemctl kexec