socat daemon systemd

https://unix.stackexchange.com/questions/125382/migrate-socat-init-script-to-systemd
For socat, I use a pure systemd approach. This is an example for a serial loopback:

[Unit]
Description=Socat Serial Loopback
#Before=my-other.service

[Service]
Type=simple
StandardOutput=syslog
StandardError=syslog
SyslogIdentifier=socat-serial-lo

ExecStart=/usr/bin/socat -d -d pty,raw,echo=0,link=/tmp/seriallo-a pty,raw,echo=0,link=/tmp/seriallo-b
Restart=always

[Install]
WantedBy=multi-user.target

This can be written to /etc/systemd/system/socat-serial-lo.service (in Ubuntu 16.04+), and then:

systemctl daemon-reload
systemctl start socat-serial-lo
systemctl enable socat-serial-lo  # (to start it during bootup)

One advantage of this method is that the command line defined by ExecStart can be tested directly from command line without alterations, in order to test the command.
answered Sep 21 at 13:45