1. # more /etc/issue

Ubuntu 9.04 \n \l

2. # more /etc/lsb-release

DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=9.04
DISTRIB_CODENAME=jaunty
DISTRIB_DESCRIPTION=”Ubuntu 9.04″

 

Sumber : http://idur.staff.uns.ac.id/2009/12/28/cek-versi-linux-ubuntu-via-terminal/