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Chapter 3Name in the course: Linux and RHCSA

Phase 1 (months 1–2): Linux and RHCSA

Linux is the base of everything that follows: cloud VMs, containers and Kubernetes nodes all run Linux. Phase 1 ends with the RHCSA exam (EX200) on RHEL 10 — a hands-on exam without internet.

  • 5 Lessons
  • 1 Commands
  • 2 Labs

$ run as a normal user# run as root (or with sudo)

Skills in this chapter

  • RHCSA (EX200) — months 1–2

3.1

Know the goal of phase 1

Be able to run a RHEL server alone: users, storage, network, services, SELinux, firewall, boot repair and scripts.

ItemValue
ExamEX200 — Red Hat Certified System Administrator, on RHEL 10
FormatHands-on, about 3 hours, no internet
Official coursesRH124 + RH134 (or the fast track RH199)
Priceabout $500

3.2

Study with these sources

One book, two course outlines, and the official objectives as the checklist.

SourceUse it for
★ EX200 objectivesThe checklist: tick every item
★ Red Hat RHCSA 10 Cert Guide — Sander van VugtMain book, chapter labs, 4 practice exams
The Linux Command Line — William Shotts (free)Strong on the shell and Bash scripts
My summariesRH124 → RH134 → RHCSA book summary

3.3

Practise the right way

Two RHEL 10 VMs, break and fix them, and do every lab with a timer.

  1. Work through RH124 and RH134 chapter by chapter, with the lab at the end of each.
  2. Do every RHCSA lab on the Labs page; write notes for each one.
  3. In the last 2 weeks: the practice exams A and B against the clock, on fresh VMs.
  4. After every task: reboot and check that it still works.

Exam tip

Most lost points are tasks that do not survive a reboot. enable --now, --permanent, -P, fstab, set-default — make it persistent, then reboot and check.

3.4

Automate one real task

Use the new skills at work at once: automate one daily task with Bash or Python.

Ideas from daily IT work:

  • A script that checks disk space, failed services and certificate dates on all servers and mails a short report.
  • A backup script with rsync, logs, and a check of the last backup date, run by a systemd timer.
  • A user-account report: accounts that did not log in for 90 days.

More: Write shell scripts, Schedule system jobs.

Commands in this lesson

3.5

Finish the phase

The phase is done when all of these are true.

  • [ ] RHCSA passed.
  • [ ] One automation script runs at work, and its code is on GitHub.
  • [ ] RH124 and RH134 summaries read, all their labs done with notes.
  • [ ] A LinkedIn post about what I learned.

Practice

All commands in this chapter