Create a Backup of configuration files
Important: the backups files are not compatible with a different version of Zentyal

Update your system with minor upgrades
Important: use only web gui to upgrade your system, don’t use apt!!

After these minor upgrades, we are ready to upgrade to the latest Zentyal version. Reboot your system, go to the dashboard and click to “Upgrade now” button!

The upgrade process require a lot of times

After many hours the installation process could be crash at this point:
“Installing new version of config file /etc/cron.daily/zentyal …”

Ok, open a terminal as root and type “reboot”
After the reboot, complete the upgrade running this as root:
dpkg --configure -a
Your system is upgraded to Zentyal 6.0!
After another reboot, we are ready to upgrade to Zentyal 6.1
Repeat the process, check for minor updates.

when you are ok with minor updates, start the upgrade process from the dashboard
Ok, the upgrade process is finish

Check if our client can log in to our new server
Go to “Users and Computers” and add an example user: “Federico II” and try to login with a client