Debian system administration
5.0(3)Suse system administration
5.0(3)Ubuntu system administration
5.0(3)CentOS system administration
5.0(3)Essential Carrier Ethernet course
5.0(3)Definitive Samba for engineers
5.0(3)Essential Broadband access for engineers
5.0(3)Certified Wireless Network Administrator
5.0(3)Linux engineer certification 1 (LPIC-2)
5.0(3)