Auto Update Linux Machine

gistfile1.txt

#!/bin/bash
#
# Auto Updating Debian (means also Ubuntu) based Linux installations
#
# add to crontab ($ crontab -e)
# @reboot /home/username/update.sh >> /home/username/update.sh.log 2>&1
# 30 1 * * * /home/username/update.sh >> /home/username/update.sh.log 2>&1
#

# recognize wether we are currently inside an update process
update_transaction_file=~/update.sh.transaction
if [ ! -f $update_transaction_file ]; then
  cat /home/username/update.sh.log >> /home/username/update.sh.log.archive
  echo "" > /home/username/update.sh.log
fi

echo
echo "################### START $(date) #############"
touch $update_transaction_file

sudo DEBIAN_FRONTEND=noninteractive apt-get update -yq
sudo DEBIAN_FRONTEND=noninteractive apt-get dist-upgrade --auto-remove --purge -yq

if [ -f /var/run/reboot-required ]; then
  echo "Reboot required!"
  sudo rm /var/run/reboot-required
  echo "################### END BEFORE REBOOT $(date) #############"
  sudo reboot
  exit 0
fi

# do additional things

rm $update_transaction_file
echo "################### END $(date) #############"