Just a heads up for those planning on running their JDS on Linux. I set up a new Ubuntu 12.0.4 VM in our VMWare environment and added a second hard drive to store the distribution point. The system drive was only 120GB in size, so I created a 1TB drive and mounted it under Linux at /mnt/Casper and added the mount point to the fstab file so that it would mount on startup.
After installing the JDS, I am unable to get the Apache Alias file in /usr/local/jds/conf/ to change the default path for the jamfds binary file. This has been confirmed by JAMF Support.
The only way around this, at this point, is to create a symbolic link in /usr/local/jds/shares that points back to your mount point. I am going to put an FR in to be able to edit the location of your JDS storage.
Once I created the symbolic link, the jamfds binary was able to start synchronizing the distribution point over.