The operating system used on the Lengau cluster is CentOS 7.

To find the exact version, e.g., to check compatibility with software, etc., you can run one od the following commands in the shell. Shown here with the output form the current system:

lsb_release -d
Description:	CentOS Linux release 7.3.1611 (Core) 

cat /etc/centos-release
CentOS Linux release 7.3.1611 (Core) 

rpm -q centos-release
centos-release-7-3.1611.el7.centos.x86_64

So we are currently running CentOS version 7.3 patch level 1611.