Need to change top of original file from:
#!/bin/bash
#
# Startup script for the pmagent
#
# chkconfig: 345 99 02
# description: Run the ServiceDesk-Plus program
To:
#!/bin/sh
### BEGIN INIT INFO
# Provides: servicedesk
# Should-Start:
# Required-Start:
# Required-Stop:
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: ServiceDesk
# Description: init script for ServiceDesk
### END INIT INFO
# /etc/init.d/servicedesk
Ubuntu need to define Default-Start and Default-Stop to configure the service.