You notice that the ntpd service is no longer running on your Linux server. You try using the systemctl start and systemctl restart commands to start the service running again. However, the service refuses to start.

Which of the following systemctl commands could you try using to make the ntpd service available for starting or restarting?

answer

systemctl reload ntpd$.$service

systemctl enable ntpd$.$service

systemctl unmask ntpd$.$service

systemctl mask ntpd$.$service