Startup and init systems (systemd) in Linux CLI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to start a service named 'nginx' using systemctl.

Linux CLI

sudo systemctl [1] nginx

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

Astatus

Bstart

Cenable

Dstop

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'enable' instead of 'start' to run the service immediately.

Using 'status' which only shows service state.

Use start to launch the service immediately.

2fill in blank

medium

Complete the code to check the status of the 'ssh' service.

Linux CLI

systemctl [1] ssh

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

Arestart

Breload

Cdisable

Dstatus

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'restart' which restarts the service instead of showing status.

Using 'disable' which prevents service from starting at boot.

The status command shows if the service is running or stopped.

3fill in blank

hard

Fix the error in the command to enable the 'docker' service at boot.

Linux CLI

sudo systemctl [1] docker

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

Aenable

Bstart

Cstatus

Dstop

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'start' which only runs the service now, not at boot.

Using 'status' which only shows service state.

Use enable to make the service start automatically at boot.

4fill in blank

hard

Fill both blanks to create a systemd service file snippet that runs a script '/usr/local/bin/myscript.sh' after the network is ready.

Linux CLI

[Unit]
Description=My Script Service
After=[1]

[Service]
ExecStart=[2]

[Install]
WantedBy=multi-user.target

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

Anetwork-online.target

B/usr/local/bin/myscript.sh

Cnetwork.target

D/bin/bash /usr/local/bin/myscript.sh

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'network.target' which may start before network is fully ready.

Using only the script path without the shell in ExecStart.

The After=network-online.target ensures the service starts after the network is fully up.
The ExecStart needs the full command to run the script, so /bin/bash /usr/local/bin/myscript.sh is correct.

5fill in blank

hard

Fill all three blanks to write a command that reloads systemd manager configuration, restarts the 'apache2' service, and then checks its status.

Linux CLI

sudo systemctl [1] && sudo systemctl [2] apache2 && sudo systemctl [3] apache2

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

Adaemon-reload

Brestart

Cstatus

Dreload

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'reload' instead of 'daemon-reload' which only reloads service configs.

Checking status before restarting the service.

First, daemon-reload reloads systemd configs.
Then, restart restarts the apache2 service.
Finally, status shows the current state of apache2.