hibereboot: A 'hibernate & reboot' one-shot hack script for systemd-based hosts

hibereboot

#!/bin/sh
set -e

# hibereboot: A 'hibernate & reboot' one-shot hack script for systemd-based hosts
#
# Place this script somewhere in your $PATH and run it (as root) to hibernate and reboot.
# For full automation, allow the script to be run with passwordless-sudo:
#
#    > /etc/sudoers
#    yourusername ALL=(ALL) SETENV:NOPASSWD: /path/to/hibereboot
#
# This script is hosted at
#    https://gist.github.com/frebib/4d8eff2528237b86c7108dc5cbe6f54b
# Adapted from
#   https://gist.github.com/setzer22/77b1dc4b226fdf2dee83e6399e30558b

if [ $EUID != 0 ]; then
    2>&1 echo "Error: Not running as root"
    2>&1 echo "Exiting..."
    exit 1;
fi

if [ -f /etc/systemd/sleep.conf ]; then
    mv /etc/systemd/sleep.conf /etc/systemd/sleep.conf.bak
fi
printf "# This file was created by hibereboot\n[Sleep]\nHibernateMode=reboot" > /etc/systemd/sleep.conf

mkdir -p /usr/lib/systemd/system-sleep/
cat <<EOF > /usr/lib/systemd/system-sleep/hibereboot-post
#!/bin/sh
set -e

if [ \$1 == 'post' ] && [ \$2 == 'hibernate' ]; then
    if grep -q 'hibereboot' /etc/systemd/sleep.conf; then
        rm -f /etc/systemd/sleep.conf
    fi
    if [ -f /etc/systemd/sleep.conf.bak ]; then
        mv /etc/systemd/sleep.conf.bak /etc/systemd/sleep.conf
    fi
    
    # Destroy self
    rm -f -- "\$0"
fi
EOF
chmod +x /usr/lib/systemd/system-sleep/hibereboot-post

systemctl hibernate