← Linux Administration learning pathLinux Administration · Module 10 of 10
Troubleshooting and career
Diagnose problems and grow as a Linux admin.
📖 Key ideas
- Follow a method: reproduce, check logs, isolate, fix, verify.
- Key logs: /var/log/syslog, auth.log, journalctl.
- Resource checks: top, free, df, iostat.
- Automate with Bash and Ansible.
- Certifications: Linux Foundation LFCS, RHCSA, CompTIA Linux+.
💡 Real-life example: Troubleshooting is detective work: gather evidence (logs) before naming the culprit.
syslogSystem log file
AnsibleAgentless automation tool
RHCSARed Hat Certified System Administrator
Root causeUnderlying reason for a problem