[Unit]                                                                                                               
Description=MuMax3 server
After=network.target

[Service]
User=mumax3
WorkingDirectory=~
Type=simple
ExecStart=/opt/mumax3/mumax3-server -exec /opt/mumax3/mumax3 -l %i
ExecReload=/bin/kill -s HUP $MAINPID

[Install]
WantedBy=multi-user.target