CentOS system administration
5.0(3)Debian system administration
5.0(3)Ubuntu system administration
5.0(3)Suse system administration
5.0(3)Red Hat system administration
5.0(3)M.D.D WHY DO I ALWAYS END UP IN SITUATIONSHIPS PACKAGE (SINGLES)
4.9(27)Linux engineer certification 1 (LPIC-2)
5.0(3)Linux system administration (LPIC-1)
5.0(3)UNIX system administration
5.0(3)Oracle database administration
5.0(3)