Originally Posted by green101
Will all linux apps work on ubuntu or just the debian or w/e?
Typically theirs 3 major kinds of precompiled files for linux workstations.
RPM = For redhat based OS's like redhat and CentOS
DEB = For debian based OS's like Ubuntu
DMG = For OS X
Besides these, theirs also source code released with virtually any application. Compiling your own applications takes a bit more time, but you can get anything running this way.