LFCS Linux Service Management Quiz

1. Which command displays detailed logs for a specific service?

Journalctl -u

Systemctl logs

Tail -f /var/log/.log

Logctl show

2. What does 'RestartSec=10' in a systemd unit file configure?

The service restarts only once every 10 seconds

A 10-second delay between service restart attempts

The service runs for a maximum of 10 seconds

Systemd checks the service status every 10 seconds

3. Which command temporarily stops a service without disabling it?

Systemctl stop

Systemctl pause

Systemctl suspend

Systemctl freeze

4. What is the purpose of the 'StandardOutput=' directive in a systemd unit?

Specifies where the service's standard output is redirected

Defines the default shell for the service

Sets the file permissions for output files

Configures logging level for the service

5. Which command shows only active (running) units on the system?

Systemctl list-units --state=active

Systemctl show-active

Systemctl active-units

Systemctl get-active

6. What does the 'WantedBy=' directive in a systemd unit file indicate?

Units that require this unit to start first

Units that want this unit to start; used for enabling services

Units that this service depends on to run

Units that this service will forcefully start

7. Which command masks a service to prevent it from being started, even manually?

Systemctl mask

Systemctl disable

Systemctl block

Systemctl prevent

8. What is the effect of running 'systemctl daemon-reload'?

Reloads systemd configuration from disk and updates internal caches

Restarts all currently running services

Clears all service logs and resets service states

Disables all services and resets systemd to defaults

9. Which directive in a systemd unit file specifies the user account under which the service runs?

User=

Owner=

RunAs=

Account=

10. What does 'Type=forking' mean in a systemd service unit?

The service forks and the parent process exits; child becomes the main process

The service creates multiple child processes that all run as the main service

The service runs in the foreground without forking

The service forks but systemd tracks only the parent process

11. Which command displays the status of a service managed by systemd?

Systemctl status

Service show

Systemd check

Service-status

12. What is the 'After=' directive used for in a systemd unit file?

Specifies units that must start before this unit

Specifies units that must start after this unit

Sets a time delay before starting the service

Defines a timeout for unit startup

13. Which command lists all unit files and their enabled/disabled status?

Systemctl list-unit-files

Systemctl show-units

Systemctl get-units

Systemctl list-services

14. What does 'Restart=always' in a systemd unit file do?

Restarts the service every minute automatically

Restarts the service whenever it exits, regardless of exit code

Restarts the service only if it exits with a non-zero status

Prevents the service from restarting under any condition

15. Which tool is used to create or modify systemd service unit files with proper syntax checking?

Systemctl edit

Nano /etc/systemd/system/.service

Vi /lib/systemd/system/.service

Systemd-edit

16. What is the purpose of the 'ExecStart' directive in a systemd unit file?

Specifies the command to execute when the service starts

Defines environment variables for the service

Sets resource limits for the service process

Configures restart behavior on failure

17. Which command restarts a running service without stopping it (reload configuration)?

Systemctl restart

Systemctl reload

Systemctl refresh

Systemctl reset

18. What does the 'Type=simple' directive in a systemd service unit specify?

The service forks and parent process exits immediately

The service runs in the foreground; systemd considers it started immediately

The service runs as a daemon only after a timeout

The service must be manually started by an administrator

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

Systemctl enable

Systemctl autostart

Systemctl boot

Systemctl activate

20. What is the primary configuration directory for systemd unit files on a Linux system?

/etc/systemd/system

/lib/systemd/system

/var/systemd/units

/usr/systemd/config