Mission 339

Scheduled service evidence

Relate a user schedule to cron service state and log entries.

Server operations
8 minutes Admin Lesson 339 of 360
crontabsystemctlgrep
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learner@clairos:/home/learner $ Unix ops lab: type a command, press Enter
Instructions 8 minutes

Click any instruction for the command details, the why, and the common mistake to avoid.

Read the learner schedule

Run crontab -l.

crontab -l
Check the cron service

Run systemctl status cron.

systemctl status cron
Find scheduled-run evidence

Run grep CRON /var/log/cron.log.

grep CRON /var/log/cron.log
Lesson support

What to notice while you play.

Objective

Build repeatable confidence with triangulating scheduled work from configuration and runtime evidence.

Hint

Start with crontab -l, inspect the result, then continue in order.

Why it matters

Triangulating scheduled work from configuration and runtime evidence helps operators explain what they know before they change anything.

Common mistakes
  • Skipping the output that proves triangulating scheduled work from configuration and runtime evidence.
  • Changing several things before recording a baseline.
Reference

Commands in this lesson.

grep [-i] <text> <file>

Find literal text inside a file.

systemctl status <service>

Inspect simulated service status.

crontab -l

List a simulated learner crontab.