Linux: Start daemon on connected USB-serial dongle
Create a udev rule like
# cat /etc/udev/rules.d/95-serialdaemon.rulesKERNEL=="ttyUSB0", TAG+="systemd", ENV{SYSTEMD_WANTS}="serialdaemon.service"Create a systemd service like
# cat /lib/systemd/system/serialdaemon.service[Unit]Description=USB serial to socket bridgeAfter=remote-fs.targetAfter=syslog.target[Service]ExecStart=/mnt/serialdaemon.shCreate the executable file
# cat /mnt/serialdaemon.sh#!/bin/shdate +%F-%T >> /var/log/serialdaemon.log/usr/local/serialdaemon/serialdaemon -serial /dev/ttyUSB0 -port 15789 -baud 38400 >> /var/log/serialdaemon.log 2>&1date +%F-%T >> /var/log/serialdaemon.log