Access Control, Auditing, Best Practices, Communication Skills, Computer Security, DNS (Domain Name System), Documentation Standards, File Systems, Firewalls, Identify Issues, LDAP (Lightweight Directory Access Protocol), Linux Administration, Linux Operating System, Logical Volume Manager (LVM), Multitasking, Network Performance/Analysis, Network Security, Network Support, Operating Systems, Operational Strategy, Operations Management, Operations Processes, Performance Tuning/Optimization, Presentation/Verbal Skills, Red Hat Linux Operating System, SSH (Secure Shell), Scripting (Scripting Languages), Security Auditing, Software Patches, Standards Development, Systems Maintenance, Ubuntu, Writing Skills