SUSE Systemd Service Management

1. What does 'systemctl isolate graphical.target' accomplish?

Stops all services and enters emergency mode

Switches to graphical mode and starts GUI-related services

Prevents network services from running

Creates an isolated container for a service

2. Which systemd feature allows services to be started on-demand when accessed?

Service templates

Socket activation

Timer units

Device binding

3. What is the difference between 'systemctl stop' and 'systemctl disable'?

Stop halts the service now; disable prevents autostart on boot

Both commands perform the same function

Stop is permanent; disable is temporary

Disable stops the service; stop removes it entirely

4. Which command permanently disables a service from starting on boot?

Systemctl stop service-name

Systemctl disable service-name

Systemctl mask service-name

Systemctl prevent service-name

5. In systemd, what is the 'After' directive used for?

Service must start before the specified unit

Service must start after the specified unit

Service depends on the specified unit to function

Service is activated only after manual intervention

6. What does the 'RestartSec' parameter define in a systemd unit file?

Maximum time allowed for service startup

Time delay before the service is restarted

Timeout for stopping the service

Security level for service restart operations

7. How do you view the journal logs for a specific service in SUSE?

Journalctl -u service-name

Systemctl logs service-name

Tail /var/log/service-name.log

Journalctl --service=service-name

8. What is the purpose of the 'Restart=always' setting in a systemd unit?

Service is restarted only on manual request

Service automatically restarts if it exits or crashes

Service restarts only if it exits with a non-zero status

Service is never restarted under any condition

9. Which command lists all active services on a SUSE system?

Systemctl list-services

Systemctl list-units --type=service

Systemctl show-all

Systemctl status --all

10. In systemd, what is the 'ExecStart' directive used for?

Specifies the command to execute when the service starts

Specifies the command to run before service startup

Defines the service restart policy

Sets the service's execution priority

11. What is the primary purpose of systemd in SUSE Linux?

Package manager for software installation

Init system responsible for starting and managing services

Firewall configuration tool

Network interface manager

12. Which systemd target is equivalent to traditional runlevel 3 (multi-user mode)?

Multi-user.target

Graphical.target

Rescue.target

Emergency.target

13. How do you reload systemd configuration after editing unit files?

Systemctl restart systemd

Systemctl daemon-reload

Systemctl reload-units

Systemctl refresh-config

14. What is the function of the 'Type=forking' setting in a service unit file?

Service runs in foreground and does not fork

Service forks into background; parent process exits after startup

Service uses socket activation

Service runs as a dbus-activated process

15. Which command displays the status of a service in SUSE systemd?

Systemctl info service-name

Systemctl status service-name

Systemctl show service-name

Systemctl check service-name

16. In systemd, what is the purpose of the 'Wants' dependency?

Strict dependency; service fails if target is not met

Weak dependency; service starts independently if target fails

Service must start before the specified unit

Service is only activated manually

17. What does the 'Before' directive in a systemd unit file specify?

The service must start before another specified unit

The service must start after another specified unit

The service requires another unit to function

The service conflicts with another unit

18. Which systemd unit type is used for mount points?

.service

.mount

.device

.target

19. What command enables a service to start automatically on boot in SUSE?

Systemctl start service-name

Systemctl enable service-name

Systemctl activate service-name

Systemctl autostart service-name

20. Which directory contains systemd unit files for user services in SUSE?

/etc/systemd/system

/usr/lib/systemd/system

/home/user/.config/systemd/user

/var/lib/systemd/user

SUSE Administrator Systemd Service Management Quiz