Command to find current Ubuntu Version

This can be handy to make sure that you had a complete update if you just recently tried to update to 12.04
Run this command to find the installed version of Ubuntu…

cat /etc/lsb-release

You will end up with output similar to the output below.

DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=12.04
DISTRIB_CODENAME=precise
DISTRIB_DESCRIPTION="Ubuntu 12.04 LTS"