There are five almost-identical copies of unix here (hkunix, rkunix, rlunix, rpunix, and xpunix). All except xpunix are stripped, and xpunix is linked to unix for programs like ps to use. If you need to save space, remove all of these that you will not use except unix itself. All of the copies were patched with the script genallsys.sh, which you can use as an example if you want to do any other patching on one of these until you can recompile.