| 601 | Introduction to Linux |
| 603 | Linux Workstation: Installing, Customizing, and Securing |
| 604 | Linux Network Server: Installing, Setup, and Securing |
| 608 | Red Hat Linux Boot Camp |
| 612 | Red Hat Enterprise Linux Troubleshooting |
| 613 | SuSE Linux Troubleshooting |
| 619 | Introduction to UNIX |
| 620 | Mastering UNIX |
