LFCS System Service Management (systemd) Questions and Answers

Question 1

A web server unit named `apache2.service` is failing to start.
A system administrator needs to view only the logs generated by this specific service from the systemd journal, starting from the most recent entries.
Which command should they use?

Accepted Answer

`journalctl -u apache2.service`

Answer

`cat /var/log/apache2/error.log`

Answer

`systemctl status apache2.service`

Answer

`journalctl /usr/sbin/apache2`

Question 2

A system administrator has just installed a new database package. They need to ensure its service, `mariadb.service`, automatically starts every time the system boots. Which command will configure this behavior?

Accepted Answer

`systemctl enable mariadb.service`

Answer

`systemctl start mariadb.service`

Answer

`systemctl add-dependency multi-user.target mariadb.service`

Answer

`systemctl set-default graphical.target`

Question 3

To diagnose a slow boot process, an administrator wants to see a list of all services ordered by the time each one took to initialize. Which of the following commands provides this specific output?

Accepted Answer

`systemd-analyze blame`

Answer

`systemd-analyze`

Answer

`journalctl -b`

Answer

`systemd-analyze critical-chain`

Question 4

An administrator needs to override a single directive in the `[Service]` section of the `httpd.service` unit file without altering the original vendor-provided file. Which command is the recommended method for creating a "drop-in" configuration snippet to accomplish this?

Accepted Answer

`systemctl edit httpd.service`

Answer

`systemctl cat httpd.service > /etc/systemd/system/httpd.service`

Answer

`vi /usr/lib/systemd/system/httpd.service`

Answer

`systemctl daemon-reload`

Question 5

A system administrator must switch the running system from its current graphical target to a non-graphical, multi-user mode for maintenance, without rebooting. Which command will achieve this state change for the current session?

Accepted Answer

`systemctl isolate multi-user.target`

Answer

`systemctl set-default multi-user.target`

Answer

`telinit 3`

Answer

`systemctl stop graphical.target`

Question 6

When creating a custom systemd service file, which section contains the `WantedBy` directive, used by `systemctl enable` to link the service to a specific target like `multi-user.target`?

Accepted Answer

`[Install]`

Answer

`[Unit]`

Answer

`[Service]`

Answer

`[Socket]`

A web server unit named `apache2.service` is failing to start.A system administrator needs to view only the logs generated by this specific service from the systemd journal, starting from the most recent entries.Which command should they use?

A web server unit named `apache2.service` is failing to start.
A system administrator needs to view only the logs generated by this specific service from the systemd journal, starting from the most recent entries.
Which command should they use?