SkillCoded

Linux Processes and Services

Schedule Jobs with Cron and Systemd Timers

Choose between recurring cron entries and systemd timers, make jobs self-contained, and verify both schedule and execution evidence.

Intermediate14 min read
Linux Processes and Services lessonLinuxPractice

UNTIMED COACHING

Practice before the pressure

Use feedback to correct the model, not merely memorize an option position.

GUIDED PRACTICE

Practice the lesson questions

Answer normal lesson questions without a timer. Every answer includes an explanation, and incorrect answers can be tried again before continuing.

CONCEPT MODELS

See the lesson as a system

Use these visual guides to connect the key ideas before answering the questions.

From Cron schedule to Persistent timingConnect cron schedule with job environment, timer unit, and persistent timing.
From Cron schedule to Persistent timingA learning path connects four specific concepts used in schedule jobs with cron and systemd timers and states the outcome of each one.
Cron scheduleRecurring command has a defined time pattern
Job environmentJob works without an interactive shell
Timer unitTimer activation points to a named service
Persistent timingMissed eligible run can be activated later
Schedule evidence: command and checksConnect schedule evidence with the starting command, expected result, and specific safety boundary.
Schedule evidence: command and checksA practical check connects schedule evidence to the relevant command, expected evidence, and caution.
Schedule evidenceFocus on schedule evidence
Starting commandUse journalctl -u <service> for timer jobs
Expected resultSchedule and job outcome are both confirmed
Safety boundaryA listed schedule does not prove command success