Linux Troubleshooting
Develop the skills to isolate Linux faults systematically and restore service with evidence through a learning path centred on Linux Troubleshooting. Explore concepts, guided practice and an applied project.
Build practical Linux Troubleshooting skills.
Skills and knowledge developed in this course.
- Triage and diagnostic discipline
- Boot and filesystem-mount failures
- Failed and misbehaving services
- Accounts, permissions and authentication
- Disk, inode and capacity incidents
- Network, DNS and port diagnosis
- Slow processes and application behaviour
- Recovery verification and incident reporting
About this course
Practise diagnosing failed boots, login problems, full filesystems, broken services and network faults. Each scenario starts with symptoms and evidence, then moves through hypothesis testing, a minimal fix and recovery validation.
Who this is for
Linux support engineers, junior administrators and on-call practitioners who need a repeatable diagnostic method.
Before you start
Ability to administer basic users, services, filesystems and network settings on a Linux VM.
Resolve a multi-fault Linux incident and write the incident handover
Investigate an application outage involving a service configuration, a data-volume issue and a connectivity fault. Deliver a timeline, root-cause explanation and post-recovery checks.
Course content
Course-specific syllabus and practical exercises. Lab release, access arrangements and final delivery scope are confirmed before enrolment.
01Triage and diagnostic discipline
+
- Separate observed symptoms from assumptions and identify recent changes.
- Use a hypothesis log, a known-good comparison and a safe rollback boundary.
Practical exerciseturn an ambiguous outage report into a sequence of diagnostic checks.
02Boot and filesystem-mount failures
+
- Distinguish bootloader, kernel, initramfs and systemd failures.
- Investigate invalid fstab entries and emergency-mode symptoms.
Practical exerciserecover a VM from a deliberately incorrect persistent mount entry.
03Failed and misbehaving services
+
- Inspect systemctl status, unit configuration, exit codes and journal filters.
- Check dependencies, ports, permissions and process ownership.
Practical exerciserepair a failed service without rebooting the host.
04Accounts, permissions and authentication
+
- Trace a failed login through identity, shell, expiry and access policy.
- Use namei, permission checks and targeted authentication logs.
Practical exerciseisolate a permission-denied error and restore the minimum required access.
05Disk, inode and capacity incidents
+
- Distinguish block-space exhaustion from inode exhaustion.
- Use df, du and lsof to identify growth and deleted-but-open files.
Practical exerciserestore service after a controlled disk-capacity failure without deleting unrelated data.
06Network, DNS and port diagnosis
+
- Check links, addresses, routes, listeners and name resolution independently.
- Use ip, ss, dig and controlled packet capture where appropriate.
Practical exercisedistinguish a DNS failure from a routing or blocked-port failure.
07Slow processes and application behaviour
+
- Correlate CPU, memory and I/O evidence before selecting a deeper tool.
- Use strace and lsof to examine a blocked or repeatedly failing process.
Practical exerciseidentify why a test application is hanging and validate the correction.
08Recovery verification and incident reporting
+
- Check data integrity, persistence after reboot and dependent service health.
- Document the failure mechanism, corrective action and recurrence controls.
Practical exerciseresolve the combined incident and present an evidence-backed handover.
Technical references
These primary vendor, project or standards sources inform this independent IT Purview outline. Reference pages checked 25 October 2026; current provider documentation and exam objectives take precedence when versions change.
From understanding to application.
Progress by learning milestone. The schedule is agreed around your starting level and learning goals.
- 01Learning milestone 1 In progress
Triage the incident
Module 1: symptoms and hypotheses
Produce a safe diagnostic plan. - 02Learning milestone 2 In progress
Restore host and access functions
Modules 2–4: boot, services and authentication
Repair faults with the smallest justified change. - 03Learning milestone 3 In progress
Isolate resource and connectivity faults
Modules 5–7: capacity, network and processes
Use evidence to identify the failure mechanism. - 04Learning milestone 4 In progress
Verify and report recovery
Module 8 and the combined incident
Deliver the timeline, fix validation and prevention recommendations.
Career outlook after this learning path
Typical roles this roadmap can support, with broad salary ranges by relevant work experience.
| Role | 0–3 years | 3–7 years | 7–12+ years |
|---|---|---|---|
| Linux / Unix Administrator | ₹5–11 LPA | ₹12–24 LPA | ₹25–45 LPA |
Ranges are indicative India-market compensation estimates in ₹ lakh per annum, not a salary promise. They reflect broad market guides and vary by location, employer, skills and role scope; the experience bands refer to relevant work experience, not time since training. Completing this course does not guarantee employment, a role, compensation or career progression. View market reference ↗