Omniback can backup up Linux servers as follows:
Open up the Linux server to NFS or Samba, create a connection to that server via NFS or Samba from a valid Omniback client(Windows,HP-UX) and you can back up any folder you make available by NFS or Samba. Samba is better for security.
I'm looking at my Data Protector 5.1 CD's and there is not a Linux pack, so my solution is the only one that will work.
SEP
Steven E Protter
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com