#!/bin/bash
export PATH=$PATH:/sbin:/usr/sbin

logfile=/var/local/log/update-system.log

echo "$(date): $HOSTNAME: update-system: Start" > $logfile

apt-get update -y >> $logfile 2>&1

uptodate=$(apt list --upgradeable 2> /dev/null | grep -v "^Listing" | wc -l)

if [ $uptodate -ne 0 ]; then
  apt-get upgrade    -y >> $logfile 2>&1
  apt-get autoremove -y >> $logfile 2>&1

  echo "Updated $HOSTNAME" >> $logfile
else
  echo "No updates for $HOSTNAME" >> $logfile
fi

echo "$(date): $HOSTNAME: update-system: End" >> $logfile