Skip to content
Clairos Learn

36 lessons · UNIX / Linux

Server operations

Processes, services, nginx validation, and capacity signals.

Start this courseFull course map

What you will practice

Server admin; Service inspection; Nginx validation; Resource inspection.

Use the worked examples when needed, then test your understanding without them.

  1. 01Server adminInspect simulated processes, services, and web server config like a cautious admin.Practice
  2. 02Service inspectionCompare simulated service status and journal output before taking action.Practice
  3. 03Nginx validationRead training nginx config and validate it without making real server changes.Practice
  4. 04Resource inspectionRead simulated disk, memory, uptime, and directory usage signals.Practice
  5. 05Host network viewInspect simulated hostname, addresses, and listening sockets.Practice
  6. 06Service listList simulated units and check nginx activity.Practice
  7. 07Service filesInspect simulated unit files and journals together.Practice
  8. 08Nginx site mapInspect training nginx site layout and run a config test.Practice
  9. 09Ports and processesCompare simulated listener and process views.Practice
  10. 10Resource baselineRead simulated disk, memory, and load indicators together.Practice
  11. 11Log disk reviewEstimate simulated log size and list log files.Practice
  12. 12Deploy script reviewRead, hash, and inspect a training deploy script.Practice
  13. 13Service failure reviewInspect a simulated inactive backup service.Practice
  14. 14Config test loopCopy, open, and test nginx configuration safely.Practice
  15. 15Scheduled tasksInspect simulated cron configuration and related logs.Practice
  16. 16Top process viewRead a simulated top snapshot before deeper process checks.Practice
  17. 17Signal simulationPractice signal language without stopping anything.Practice
  18. 18Open files and listenersUse lsof to relate sockets to services.Practice
  19. 19Mount and block devicesInspect simulated mounts and block devices.Practice
  20. 20Operations checkpointPull process, service, storage, and log signals together.Practice
  21. 21Systemctl cat reviewRead service unit files before making assumptions.Practice
  22. 22Unit dependency readingRead service definitions and list units together.Practice
  23. 23Journal narrowingUse recent journal windows before scanning full logs.Practice
  24. 24Cron service reviewConnect cron service status, schedule, and logs.Practice
  25. 25Mount storage reviewCompare mounted filesystems and block-device inventory.Practice
  26. 26Nginx validate loopValidate config, read config, and compare a changed copy.Practice
  27. 27Resource baseline advancedBuild a resource baseline from uptime, memory, and disk.Practice
  28. 28Open file triageMap open sockets and processes to services.Practice
  29. 29Backup service noteInspect an inactive backup service and write a review marker.Practice
  30. 30Service failure notesRead failed service evidence without restarting anything.Practice
  31. 31Mac service orientationCompare launchd-style inspection with systemd habits.Practice
  32. 32Unit file readingRead a service definition before interpreting its runtime state.Practice
  33. 33Service state triangulationCompare status, active state, and journal evidence for one service.Practice
  34. 34Mount and capacity correlationConnect mounted filesystems, block devices, and available space.Practice
  35. 35Scheduled service evidenceRelate a user schedule to cron service state and log entries.Practice
  36. 36Server operations bridgeCheckpoint unit, journal, process, and storage evidence.Practice