RHCSA Systemd Service Management

1. A service unit file has 'Type=forking'. What does this indicate?

Service forks into background and parent process exits

Service runs in foreground indefinitely

Service creates multiple instances

Service requires a socket for activation

2. Which command lists all service units, including inactive ones?

Systemctl list-services

Systemctl list-units --type=service --all

Systemctl show-all services

Systemctl services-all

3. The 'Restart' directive is set to 'always'. What happens if the service crashes?

Service is never restarted

Service is restarted automatically

Service requires manual restart

Service is masked and disabled

4. Which directive specifies the target unit that this service should be installed with?

Wants

Requires

WantedBy

InstallTarget

5. A unit file is located in /usr/lib/systemd/system. Can it be overridden by a file in /etc/systemd/system?

No, system files take precedence

Yes, /etc files override /usr/lib files

Only if the /etc file has a higher version number

Only if systemd is restarted

6. Which command restarts a service and reloads its configuration?

Systemctl reload service-name

Systemctl restart service-name

Systemctl reload-or-restart service-name

Systemctl refresh service-name

7. The 'Requires' directive creates a hard dependency. If the required unit fails, the dependent unit also fails. True or False?

True

False

8. A service fails to start and shows 'failed' status. Which command provides detailed error information?

Systemctl log service-name

Journalctl -u service-name

Systemctl error service-name

Systemctl debug service-name

9. What does 'ExecStart' define in a service unit file?

The command to run when stopping the service

The command to execute when starting the service

The user account under which the service runs

The restart policy for failed services

10. Which command masks a service to prevent it from being started by any method?

Systemctl disable service-name

Systemctl mask service-name

Systemctl block service-name

Systemctl restrict service-name

11. Which command enables a service to start automatically at boot?

Systemctl start service-name

Systemctl enable service-name

Systemctl activate service-name

Systemctl begin service-name

12. Which command stops a service but does not disable it from auto-starting?

Systemctl disable service-name

Systemctl stop service-name

Systemctl mask service-name

Systemctl prevent service-name

13. The 'After' directive in a unit file ensures that a service starts after another unit loads. True or False?

True

False

14. What is the correct syntax to view all enabled services?

Systemctl list-enabled

Systemctl list-unit-files --state=enabled

Systemctl show-enabled

Systemctl enabled-services

15. Which section in a unit file contains the service execution configuration?

[Unit]

[Service]

[Install]

[Execution]

16. A service is in 'inactive' state. What does this mean?

Service is running but not accepting connections

Service is not running and has never been started

Service failed to start due to an error

Service is disabled and cannot be started

17. Which command reloads the systemd daemon configuration without restarting services?

Systemctl refresh

Systemctl reload-daemon

Systemctl daemon-reload

Systemctl reread

18. What does the 'Wants' directive in a unit file specify?

Hard dependency that must be satisfied

Soft dependency that does not cause failure if not met

Conflicts with another unit

Requires restart after modification

19. Which command displays the current status of a specific service?

Systemctl check httpd

Systemctl status httpd

Systemctl info httpd

Systemctl show httpd

20. What is the primary directory where user-created systemd unit files should be stored?

/etc/systemd/system

/usr/lib/systemd/system

/var/systemd/system

/opt/systemd/system

RHCSA Systemd Service Management Quiz