Upgrade from 4.5.3 to 5.0

[walle]

Hi,

My existing Zimbra (4.5.3) setup is on Fedora Core6, i need to upgrade to Zimbra 5.0 on either Fedora 7 or higher OR Ubuntu 8.10.

Does anyone have any upgrade documentation.

Thanks in advance

Wall-e

[dwmtractor]

Both the wiki and the forum have other threads on moving from one server or version to another, which is what you are doing here. This wiki article gives a quick overview:
Moving ZCS to New Server - Zimbra :: Wiki

You may also find useful information in this thread:
Problem With Moving ZCS to New Server

But the clearest summary of the (correct) steps you need to take is here:
Move Zimbra to new server

Be sure to post back if you have any problems or questions.