Notifies you to upgrade your OS

apt-remind.sh

#!/bin/bash

### Checks the last APT upgrade and notifies if it was too long ago

# requires: libnotify-bin

NOTIF_DURATION=15000
UPGRADE_DAYS=7

notify() {
	notify-send -u normal -t $NOTIF_DURATION "$1"
}

get_last_upgrade() {
	grep -E "^Upgrade: " -B 5 | tail -5 | grep -E "^Start-Date: " | tr -s ' ' | cut -d ' ' -f2,3
}

upgrade_date=$(cat "/var/log/apt/history.log" | get_last_upgrade)

if [ "$upgrade_date" = "" ] ; then
	>&2 echo Falling back
	upgrade_date=$(zcat "/var/log/apt/history.log.1.gz" | get_last_upgrade)
fi

days=$((($(date +%s) - $(date -d"$upgrade_date" +%s)) / 86400))

if [ "$days" -ge $UPGRADE_DAYS ] ; then
	notify "It's been $days days since your OS was updated."
fi

echo $days

Thank you for the script. It is a great idea which, in my opinion, leads to other great possibilities such as initiating updates after n days.

Say, instead of (or after) invoking the libnotify-bin, it could trigger Nala fetch for newer or faster download mirrors or trigger apt updates etc.