This script will start soffice headless listening on port 8100. You can use it eg. with JODConverter.

#!/bin/bash
# openoffice.org  headless server script
#
# chkconfig: 2345 80 30
# description: headless openoffice server script
# processname: openoffice
# 
OOo_HOME=/usr/bin
SOFFICE_PATH=$OOo_HOME/soffice
PIDFILE=/var/run/openoffice-server.pid

set -e

case "$1" in
    start)
    if [ -f $PIDFILE ]; then
      echo "OpenOffice headless server has already started."
      sleep 5
      exit
    fi
      echo "Starting OpenOffice headless server"
      $SOFFICE_PATH -nologo -nodefault -norestore -nocrashreport -nolockcheck -headless -nofirststartwizard -accept="socket,host=localhost,port=8100;urp" & > /dev/null 2>&1
      touch $PIDFILE
    ;;
    stop)
    if [ -f $PIDFILE ]; then
      echo "Stopping OpenOffice headless server."
      killall -9 soffice && killall -9 soffice.bin
      rm -f $PIDFILE
      exit
    fi
      echo "Openoffice headless server is not running."
      exit
    ;;
    *)
    echo "Usage: $0 {start|stop}"
    exit 1
esac
exit 0