The easiest way to check Ubuntu release is to use lsb_release command.
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 11.04
Release: 11.04
Codename: natty
Which Ubuntu release are you using?
The easiest way to check Ubuntu release is to use lsb_release command.
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 11.04
Release: 11.04
Codename: natty