I realize I'm way behind the times on this one, but I have to ask anyway. Way back in the day UNIX got forked between SCO and Bell Labs and IBM and...who else?...and each developed their own versions, and apparently this is the *nix version of the tale of the Serpent and the Forbidden Fruit, or some bullshit like that. Then Torvalds came along and requisitioned key parts of the now-disputed UNIX kernel, and he and his comrade programmers made a "lite" UNIX for normal people to use for free. Robin Hood stuff, and all that. And so now there's still UNIX, which has been split into AIX and HPUX and IRIX and Solaris, and there's Linux, which has pretty much always had Redhat and SuSE and Gentoo on one side of its own Great Schism and a half a billion Debian variants on the other side (it's so easy to make a distro when all the packages are centralized, isn't it? Just add a splash screen and some icons and call it new!). And Solaris is supposedly trying to make Linux obsolete because it's open-source now and anyone can use it for free, and Torvalds thinks Solaris has always been obsolete, and all the huddled masses of the world are despairing that they'll never escape Microsoft Windows if *nix developers can't unite in a great, shining utopia of source code and shell scripts... (yawn, stretch) ...what I want to know is, do I really give a shit about all that, so long as they all stay POSIX compliant and can run on the same hardware?