Ubuntu
Ubuntu Server Edition does not seem to be stable enough for production use. It is free and well supported by the Canonical people, but it is closely tied to their desktop version with its frequent updates.
What we have have found instead, is that Ubuntu Desktop with GTM and VistA installed makes a great development environment, all free. The Ubuntu desktop version competes very well with Windows for features and usability. Install GT.M and VistA and you can quickly access a Mumps programming environment, or use Fileman,or directly access VistA menus, routines and source code. The Ubuntu Terminal gives easy access to VistA as a roll-n-scroll user. Unfortunately, to use CPRS you would need to connect another Windows machine through your LAN, or use CPRS in Crossover on Ubuntu (but this is supposedly not at a clinically usable level of development yet). --ssw0213
Here is some info on how the UNIX filesystem should be laid out:
