[Solved] In a systemd timer unit, what effect does setting Persistent=true have on timer behavior? — Ans: It triggers missed timer events immediately after the system boots. | Linux CLI

Linux CLI - Cron and Scheduling

In a systemd timer unit, what effect does setting Persistent=true have on timer behavior?

AIt makes the timer run only once at boot time.

BIt disables the timer after the first run.

CIt triggers missed timer events immediately after the system boots.

DIt prevents the timer from running if the system is idle.

Step-by-Step Solution

Solution:

Step 1: Understand Persistent=true
This setting ensures that if the system was off or suspended when a timer event was supposed to occur, systemd triggers the missed event immediately after boot.
Step 2: Effect on timer execution
Without this setting, missed timer events are skipped, so the service won't run for those missed times.
Final Answer:
It triggers missed timer events immediately after the system boots. -> Option C
Quick Check:
Persistent=true means catch up missed runs [OK]

Quick Trick: Persistent=true runs missed timers after reboot [OK]

Common Mistakes:

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In a systemd timer unit, what effect does setting Persistent=true have on timer behavior?