Updated EGroupware EPL Installation (markdown)

EGroupware-EPL-Installation.md

@@ -1182,7 +1182,38 @@ Manual update:
 <pre>aptitude update; aptitude safe-upgrade;
 </pre>
 
-Automatic update: Using a cron script or cron-apt; have a look at: [https://help.ubuntu.com/community/AutomaticSecurityUpdates](https://help.ubuntu.com/community/AutomaticSecurityUpdates) or [https://help.ubuntu.com/community/AutoWeeklyUpdateHowTo](https://help.ubuntu.com/community/AutoWeeklyUpdateHowTo)
+Automatic update: 
+Install unattended-upgrades if it's not already installed:
+```
+sudo apt-get install unattended-upgrades
+```
+Now you need to add egroupware packages into list of allowed packages in 50unattended-upgrades config file:
+```
+vi /etc/apt/apt.conf.d/50unattended-upgrades
+```
+find the Unattended-Upgrade::Allowed-Origins and based on your distro you should add the following line:
+
+```
+"obs\://build.opensuse.org/stylite-epl/xUbuntu_17.10:";
+```
+in the above case since our distro was 17.10 we add the xUbuntu_17.10. If you are using other debians like deb 8/9 instead of Unattended-Upgrade::Allowed-Origins you need to look for Unattended-Upgrade::Origins-Pattern and add the following line:
+```
+"o=obs://build.opensuse.org/stylite-epl/Debian_8.0,a=";
+```
+
+In order to check if the unattended-upgrades works with the given packages, you may run the following command:
+```
+unattended-upgrades --dry-run --debug
+```
+*--dry-run*: only downloads the upgradable packages but will not install them unless you run the unattended-upgrades command with no parameter.
+</br>
+If you wish to check logs and see what has happened with packages, you may read the following logs:
+</br>
+<pre>
+/var/lib/unattended-upgrades/unattended-upgrades.log
+/var/lib/unattended-upgrades/unattended-upgrades-shutdown.log 
+/var/lib/unattended-upgrades/unattended-upgrades-dpkg.log
+</pre>
 
 <a id="K14">