Ubuntu/Debian update mailer

10-06-2012 | Remy van Elst


Table of Contents


This is a bash script for Ubuntu and Debian, to be run by cron on a set interval. It checks if there are apt-updates, and if so, mails an overview of the packages which can be updated, whith their local version, the version available and an URL to the Ubuntu package site where you can see the changelog. I wrote this as an addition for my Nagios monitoring, that only shows how many updates there are, this is a lot more verbose. It also runs on Debian since 1 Nov 2012. Only the links don't work then, because the packages are different.

Example output:

If there are no updates:

No updates available for host vps11.sparklingclouds.nl on date 21.09.2012

If there are updates:

--- Updates for host: vps11.sparklingclouds.nl ---
Date: 21.09.2012 

Total updates available: 44

-- Package: apport --
 Installed: 2.0.1-0ubuntu12
 Candidate: 2.0.1-0ubuntu13
Package Information: http://packages.ubuntu.com/precise/apport
-- End package apport --

-- Package: base-files --
 Installed: 6.5ubuntu6
 Candidate: 6.5ubuntu6.2
Package Information: http://packages.ubuntu.com/precise/base-files
-- End package base-files --

-- Package: bind9-host --
 Installed: 1:9.8.1.dfsg.P1-4ubuntu0.2
 Candidate: 1:9.8.1.dfsg.P1-4ubuntu0.3
Package Information: http://packages.ubuntu.com/precise/bind9-host
-- End package bind9-host --

-- Package: build-essential --
 Installed: 11.5ubuntu2
 Candidate: 11.5ubuntu2.1
Package Information: http://packages.ubuntu.com/precise/build-essential
-- End package build-essential --

-- Package: dbus --
 Installed: 1.4.18-1ubuntu1
 Candidate: 1.4.18-1ubuntu1.1
Package Information: http://packages.ubuntu.com/precise/dbus
-- End package dbus --

The script

#!/bin/bash
#Copyright (c) 2012 Remy van Elst
#Permission is hereby granted, free of charge, to any person obtaining a copy
#of this software and associated documentation files (the "Software"), to deal
#in the Software without restriction, including without limitation the rights
#to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
#copies of the Software, and to permit persons to whom the Software is
#furnished to do so, subject to the following conditions:
#
#The above copyright notice and this permission notice shall be included in
#all copies or substantial portions of the Software.
#
#THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
#IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
#AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
#LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
#OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
#THE SOFTWARE.
# 01-11-2012 update version 2, now also supports Debian.


if [ -f /etc/lsb-release ]; then
    TYPE="UBUNTU"
elif [ -f /etc/debian_version ]; then
    TYPE="DEBIAN"
fi

case ${TYPE} in
    "UBUNTU")
        VERSION=`grep "DISTRIB_CODENAME" /etc/lsb-release | awk -F = '{ print $2 }'`   
        ;;
    "DEBIAN")
        VERSION="Debian `cat /etc/debian_version`"
        ;;    
esac


HOSTNAME=`hostname`
EMAIL="user@domain.com"
SUBJECT="Updates for host ${HOSTNAME}"
DATE=`date +%d.%m.%Y`
AVAIL_UPD=`apt-get -s upgrade | awk '/[0-9]+ upgraded,/ {print $1}'`

function mailupdates {

echo -e "--- Updates for host: ${HOSTNAME} ---"
echo -e "Date: ${DATE} \n\n"

echo -n "Total updates available: "
apt-get -s upgrade | awk '/[0-9]+ upgraded,/ {print $1}'
echo -e "\n\n"

for i in `aptitude search ~U | cut -c 5- | awk '{ print $1  }'`; do 
    echo "-- Package: ${i} --"
    apt-cache policy ${i} | grep 'Installed\|Candidate'
    if [ $TYPE="UBUNTU" ]; then
        echo "Package Information: http://packages.ubuntu.com/${VERSION}/${i}"
    fi
    echo -e "-- End package ${i} --\n"
done

}


if [[ ${AVAIL_UPD} == 0 ]]; then
    #echo "No updates available for host $HOSTNAME on date ${DATE}" | mail -s "${SUBJECT}" ${EMAIL}
    sleep 1
else
    mailupdates | mail -s "${SUBJECT}" ${EMAIL}
fi

Tags: apt, bash, command-line, debian, ubuntu, update,