The following worked fine on Linux Ubuntu 14 LTS from Bitnami (Redmine) Virtual Image.
Install apg-get install rpm netkit-inetd
add to line to inetd.conf if it’s not there
cat /etc/inetd.conf omni stream tcp nowait root /opt/omni/lbin/inet inet -log /var/opt/omni/log/inet.log
then install using omnish.
chmod +x omnisetup.sh
./omnisetup.sh -server (your HP DP Manager) -da
Allow a firewall wall
ufw add 5555
Some info taken from here as well.
Once all done check if you can telnet to port 5555
telnet your_server_ip 5555