How can I check the version of a Liferay instance?

Question

I have several instances of Liferay Portal (bundled with Apache Tomcat 5.5.x/6.x) and I need to know how to check the version of those Liferay instances

Answer 1

As an administrator, go to:

Control Panel -> Configuration -> Server Administration

The version is in the information banner at the top of the "Resources" tab.