System Administrator Knowledge Areas

Linux             Apache          Bind           Tomcat      Qmail

MySQL         Postgresql      FTP            cPanel        Plesk

Exim              Enkompass    IIS             MSSQL      DNS

 Firewall         PSA database  Mail enable       Windows FTP  

Administrator skills

Performance tuning / monitoring and troubleshooting.

Kernel compilation / tweaking.

Security concepts / tools /services.

Familiarity  with various distributions.

Familiarity with open source concepts and development methodologies.

Package management  ( RPM etc... )

Compilation and installation of software from source.

Shell scripting.

Booting routines.

Services.

Logging.

Backup, restore and disaster recovery.