Edit file File name : update-notifier-common Content :#!/bin/sh set -e [ -x /usr/lib/ubuntu-release-upgrader/release-upgrade-motd ] || exit 0 sleep_then_check() { # Sleep for up to an hour to spread the load of checking for updates on # the Ubuntu infrastructure sleep $(shuf -i 1-3600 -n 1) # Check to see whether there is a new version of Ubuntu available /usr/lib/ubuntu-release-upgrader/release-upgrade-motd } sleep_then_check & Save