CISN 31 - Linux Operating System Degree Applicable, CSU Corequisite: CISN 31L Advisory: CISB 11 Concepts and skills in planning and installing Linux Operating System (OS) and its graphical user interface (GUI); using Linux Shells and system administration commands; managing user accounts; installing hardware and software; and maintaining file systems and system resources. Students must take CISN 31L concurrently.