Build the diagnostic instincts and root-cause analysis skills that separate reactive firefighters from effective Linux troubleshooters. This lab-intensive course dedicates roughly 75 percent of class time to hands-on exercises, with over 120 independent troubleshooting scenarios organized by topic and progressive difficulty, giving students real practice diagnosing and resolving failures across the full systems administration stack.
Course content spans troubleshooting methodology, essential diagnostic tools such as strace, tcpdump, lsof, and Wireshark, rescue and recovery procedures, boot process diagnosis, filesystem and storage troubleshooting including LVM and software RAID, network configuration and connectivity issues, firewall analysis, and service-level troubleshooting for DNS, NFS, Samba, Apache, Postfix, MariaDB, and other enterprise services. Students also cover kernel module management, performance analysis with vmstat and iostat, user authentication with PAM and LDAP, and SELinux policy troubleshooting.
Each topic group includes self-paced lab scenarios with progressive hints, allowing students to work at their own level and focus on areas most relevant to their environment. Labs run on your choice of RHEL or SLES, with courseware cross-reference where the distributions differ.