FREE Linux+ Systemd Service Management Questions and Answers

Question 1

A system administrator needs to ensure that the `nginx` web server starts automatically upon system boot. Which of the following commands will accomplish this?

Accepted Answer

systemctl enable nginx

Answer

systemctl start nginx

Answer

systemctl boot nginx

Answer

systemctl load nginx

Question 2

After modifying the configuration file for a running service, which `systemctl` command should be used to apply the changes without stopping the service if possible?

Accepted Answer

systemctl reload httpd

Answer

systemctl restart httpd

Answer

systemctl update httpd

Answer

systemctl refresh httpd

Question 3

A Linux administrator is troubleshooting a service named `customapp.service` that is failing to start. Which command will provide detailed information about the service's status, including recent log entries?

Accepted Answer

systemctl status customapp.service

Answer

systemctl show customapp.service

Answer

systemctl list-units --type=service

Answer

systemctl is-failed customapp.service

Question 4

Which of the following commands prevents a service from being started, either manually or by another service, by creating a symlink to `/dev/null`?

Accepted Answer

systemctl mask cron.service

Answer

systemctl stop cron.service

Answer

systemctl disable cron.service

Answer

systemctl kill cron.service

Question 5

A system administrator has created a new systemd unit file at `/etc/systemd/system/newapp.service`. What is the immediate next step required to make systemd aware of this new service file before it can be started or enabled?

Accepted Answer

systemctl daemon-reload

Answer

systemctl restart systemd

Answer

systemctl reenable newapp.service

Answer

systemctl daemon-reexec

Question 6

To view all available service unit files on the system and see their current state (e.g., enabled, disabled, static), which command should be used?

Accepted Answer

systemctl list-unit-files --type=service

Answer

systemctl list-units --type=service

Answer

systemctl show --all --type=service

Answer

systemctl list-dependencies --type=service