Reboot linux if Needed

reboot_if_needed.sh

#!/bin/bash
if [[ $# -eq 0 ]] ; then
    echo 'Must pass an time for reboot in form hh:mm'
    exit 1
fi

if [ -f /var/run/reboot-required ]; then
  echo 'Reboot required, scheduling based on parameter'
  sudo shutdown -r $1
fi

This gist verify if file /var/run/reboot-required is present, since it represents if the server needs restart.