Suse system administration
5.0(3)Ubuntu system administration
5.0(3)Ansible for engineers
5.0(3)Red Hat system administration
5.0(3)Definitive Ethernet LANS for engineers
5.0(3)OpenStack for NFV and SDN
5.0(3)Securing Microsoft systems
5.0(3)Definitive Kamailio for engineers
5.0(3)