Enablling Hibernate on Ububtu 14.04 Trusty http://ubuntuhandbook.org/index.php/2014/04/enable-hibernate-ubuntu-14-04/
Ofcoure, you can find out your version of Ubuntu by running the command
lsb_release -a which on my computer gives
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.04.1 LTS
Release: 14.04
Codename: trusty
This article provides an alternate way: https://help.ubuntu.com/community/CheckingYourUbuntuVersion