LFCS Certification System Service Management (systemd) 2

Question 1

Which systemctl command displays the current state of a service, including its active state, PID, and recent log lines?

Accepted Answer

systemctl status sshd

Answer

`systemctl status sshd` shows the service's active state, PID, enabled status, and recent journal output in a human-readable format.

Question 2

What file does systemd read to determine which target to boot into by default?

Accepted Answer

/etc/systemd/system/default.target

Answer

`/etc/systemd/system/default.target` is a symlink managed by `systemctl set-default` that determines the default boot target.

Question 3

A service unit file contains `Type=forking`. What does this mean?

Accepted Answer

The parent process exits after forking a child, and the child becomes the main process

Answer

With `Type=forking`, systemd expects the parent process to exit after forking, and tracks the child (often via PIDFile=) as the main service process.

Question 4

Which directive in a [Service] section tells systemd to restart a service whenever it exits, regardless of exit code?

Accepted Answer

Restart=always

Answer

`Restart=always` causes systemd to restart the service on any exit condition, including clean exits.

Question 5

You want to see all units that have failed. Which command shows only failed units?

Accepted Answer

systemctl --failed

Answer

`systemctl --failed` lists all units currently in a failed state.

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