Ravindra BagaleCourses & study guides

Chapter 4: Linux Ops Refresh for DevOps

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Chala mitrano, aaj aapan Linux ops cha short refresh gheuya — DevOps tools chya adhi. App "down" asel tar process dead aahe ka, port band aahe ka, disk full aahe ka? Paths, permissions, logs, systemd, df / ps / ss, SSH keys. Deep Linux aani EC2 launch AWS course madhe aahet — ithe fakt daily ops muscle. Ghabru naka: commands thodya, habit mothi.

What you will learn in this chapter

  • Paths, permissions, log following
  • systemd start/enable vs service
  • Disk, process, listening ports
  • SSH keys, scp and rsync one-liners
  • When to open the AWS Linux chapters

Concepts in this chapter

  1. 4.1When the app is "down" — three checks
  2. 4.2Paths and permissions — enough to stay safe
  3. 4.3Logs — journalctl and tail -f
  4. 4.4systemd — start, enable, status
  5. 4.5Disk, process, ports — the triage trio
  6. 4.6SSH keys, scp, rsync — one-liners
  7. 4.7Worked triage story — peak traffic
  8. 4.8Quick extras — uptime, memory, who am I
  9. 4.9What this chapter deliberately skips

The chapter recap is at the end of the last concept page.