Upgrade Zimbra Collaboration Suite 8.7 to 8.8 on Ubuntu

The Zimbra Collaboration Server is a mail server, collaborative web application and a web-based mail server admin console in a single application. It provides LDAP, antivirus, antispam, collaboration features and an ajax webmail client. In this tutorial, we will see how to upgrade an installation of Zimbra 8.7.11 to Zimbra 8.8.10 (latest version available).