systemctl enable wpa_supplicant@wlan0

systemd has its own logging process called <code>journal</code> avoiding to start the ''syslog'' daemon. For the status information it is possible to use <code>journalctl</code>.

</pre>

Boot time analysis is one of the most important and interesting activity for an embedded system: systemd provide an userspace command called <code>systemd-analyze</code> to help in this (hard) task

<code>systemd-analyze</code> provides a good level of boot time information for further optimizations:

The <code>time</code> parameter gives the total amount of seconds used for starting the kernel and reaching the userspace.

</pre>

The <code>blame</code> parameter gives the list of started services and how long they took for starting:

</pre>

The <code>critical-chain</code> parameter shows the startup process flow and the time consumed by each service.

|}

For creating a new service the following file has to be created:

/etc/systemd/system/''<service_name>''.service

The following paragraph shows how to create a new service called <code>iperf3</code> executing the iperf3 command in server mode

</pre>

{| class="wikitable"

|}

Starting the service from userspace: