Get the Zenoss .deb (for Debian) or .rpm (for RHEL and SUSE).

The  Zenoss stack includes its own copy of MySQL, which, by default, will run on port 3307. Change your current configuration to point to port 3307.

In the  Zenoss interface, go to the Event Manager. Select Edit, and then change the port from 3306 to 3307

Back up all data:

$ zenbackup --file=/tmp/zenbackup.tgz

Make a note of which ZenPacks you have installed.

Shut down the system:

$ zenoss stop

Move the current  Zenoss to a new name:

$ mv /usr/local/zenoss /usr/local/zenoss-2.1.3

Install the stack on Debian by using the .deb:

# dpkg -i zenoss-stack*.deb

Copy the configuration files to a backup directory:

$ cd /usr/local/zenoss/zenoss/etc
$ cp zeo.conf zope.conf /tmp

Start MySQL:

# /usr/local/zenoss/mysql/scripts/ctl.sh start

Reinstall any .egg ZenPacks that were previously installed. For .zip ZenPacks, convert these to .egg files and then install them.

Load your data back with zenrestore:

$ zenrestore --dbuser=zenoss --dbpass=zenoss --file /tmp/zenbackup.tgz

Copy the configuration files back:

$ cp /tmp/zope.conf /usr/local/zenoss/zenoss/etc
$ cp /tmp/zeo.conf /usr/local/zenoss/zenoss/etc

Start zeo:

$ zeoctl start

Migrate the data:

$ zenmigrate 

Re-register the portlets:

$ zendmd
>>> from Products.ZenWidgets.ZenossPortlets.ZenossPortlets \
    import register_default_portlets
>>> register_default_portlets(zport.ZenPortletManager)
>>> commit()

Start  Zenoss:

$ zenoss start