systemd timers in Linux CLI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to start a systemd timer named backup.timer.

Linux CLI

sudo systemctl [1] backup.timer

Drag options to blanks, or click blank then click option'

Aenable

Bstart

Cstop

Dstatus

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'enable' only sets the timer to start on boot but does not start it immediately.

Using 'stop' or 'status' does not start the timer.

The start command activates the timer immediately.

2fill in blank

medium

Complete the code to check the status of a systemd timer named cleanup.timer.

Linux CLI

systemctl [1] cleanup.timer

Drag options to blanks, or click blank then click option'

Arestart

Bdisable

Cstatus

Dreload

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'restart' will restart the timer but does not show status.

Using 'disable' stops the timer from starting on boot.

Using 'reload' reloads configuration but does not show status.

The status command shows the current state and recent logs of the timer.

3fill in blank

hard

Fix the error in the command to enable a timer named sync.timer.

Linux CLI

sudo systemctl [1] sync.timer

Drag options to blanks, or click blank then click option'

Aenable

Bstop

Cdisable

Dstart

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'start' only runs the timer now but does not enable it on boot.

Using 'disable' or 'stop' will prevent the timer from running.

The enable command sets the timer to start automatically at boot.

4fill in blank

hard

Fill both blanks to create a systemd timer file snippet that runs a service every 10 minutes.

Linux CLI

[Timer]
OnUnitActiveSec=[1]
Unit=[2]

Drag options to blanks, or click blank then click option'

A10min

Bbackup.service

C10m

Dcleanup.service

Attempts:

3 left

💡 Hint

Common Mistakes

Using '10min' is not a valid time format for systemd timers.

Specifying the wrong service name will not trigger the intended service.

Use 10m for 10 minutes interval and specify the service to run with Unit=backup.service.

5fill in blank

hard

Fill all three blanks to create a systemd timer file snippet that runs a service daily at 2:30 AM.

Linux CLI

[Timer]
OnCalendar=[1]
Unit=[2]
Persistent=[3]

Drag options to blanks, or click blank then click option'

Adaily

Bbackup.service

Ctrue

D2:30

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'daily' schedules the timer at midnight instead of 2:30 AM.

Leaving Persistent off may cause missed runs if the system was off.

Use 2:30 for daily at 2:30 AM schedule, specify the service with backup.service, and set Persistent=true to catch missed runs.