GL120 - Linux Fundamentals
Provides the essential skills needed to be proficient at the Unix or Linux command line.

GL250 - Enterprise Linux Systems Administration
Covers the skills needed to deploy and manage Linux systems with focus on the core OS services.

GL275 - Enterprise Linux Network Services
Teaches how to deploy popular Linux network services such as web, mail, and directory services.

GL615 - Linux for UNIX Administrators
Accelerated course for people experienced in Linux or UNIX. Covers the GL250 and GL275 material in a single packed week.

GL510 - Linux Network Security
Develop an understanding of sophisticated network based attacks and how to defend against them. Key topics covered include NIDS, and firewalls.

GL550 - Enterprise Linux Security Administration
Teaches how to properly secure services on a Linux host. Key topics covered include Kerberos, and SELinux.

GL314 - Linux Troubleshooting
Teaches troubleshooting methodology and tools. Intense troubleshooting lab exercises; coverage spans the topics found in the GL250 and GL275 courses.