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====== Linux Services ======
<blockquote>A service is a process or application which is running in the background, either doing some predefined task or waiting for some event.
<cite>https://lym.readthedocs.io/en/latest/services.html</cite>
</blockquote>

Service files are in ''/etc/systemd/system/'' and are named ''SOMETHING.service''.

This one runs iPerf3 server so you can do bandwidth tests whenever you want.
<file iperf.service>
# /etc/systemd/system/iperf.service
[Unit]
Description=iperf3 server
After=syslog.target network.target auditd.service

[Service]
Type=simple
Restart=on-failure
RestartSec=1
RemainAfterExit=yes
ExecStart=/usr/bin/iperf3 --server --verbose --logfile /var/log/iperf_server.log --pidfile /var/run/iperf.pid

[Install]
WantedBy=multi-user.target
</file>

After you edit the service file you have to reload it with 
<code>sudo systemctl daemon-reload</code>
... and then restart the service with 
<code>sudo service iperf restart</code>
...and then might want to check it's status with ''service iperf status''.