System Administration Guide
General
Best Practices
- A Case-Study in Best Practice for Operating System Management - Written by colmmacc and grimnar
Groups
- SAGE-IE - System Administrators Guild of Ireland
- IE-NOG - Network Operators Group
- Redbrick Admins - Redbrick Admin Discuss Mailing list (only has spurts of life, but has publicly readable archives for casual interest)
Tests
- Redbrick System Administrator Tests - Past Redbrick admin tests
- Linux Professional Institute Certification - Level 1 (Junior Admin), Level 2 (Intermediate Admin) - 2 tests in each