Ubuntu and CentOS are now in the rPath. The company yesterday began shipping a version of its rBuilder build and release management system for Linux that adds those distros; the tool previously worked only with Novell SUSE Linux Enterprise and its own rPath Linux.

rBuilder packages a Linux application with essential parts of its underlying operating system into a single, virtualized image. That image can then be delivered via network, disc or other means, or installed on dedicated hardware and deployed as a stand-alone appliance.

More Here