My File:
[Unit]Description=Calibre ServiceAfter=network.target[Service]Type=forkingUser=calibreGroup=usersPIDFile=/var/run/calibre/calibre-server.pidPermissionsStartOnly=trueExecStartPre=-/bin/mkdir /var/run/calibreExecStartPre=/bin/chown -R calibre:users /var/run/calibreExecStart=/usr/bin/calibre-server \ --daemonize \ --username=calibre \ --port=9400 \ --pidfile=/var/run/calibre/calibre-server.pid \ --with-library=/srv/drive-by-id-ata-Hitachi_HDS723020BLA642_MN1240F33MV0LD-part1/calibre[Install]WantedBy=default.target
Regarding the PID-File there is nothing inside /var/run/calibre