Outside of the Windows desktop, much of the world's software is
written to conform to a Unix-based standard called POSIX. While
users of Vista Enterprise and Ultimate editions can, in theory, add
a Microsoft version of POSIX compliance known as Subsystem for Unix
-based Applications to their PCs, our experiences with this feature
yielded more frustration that fruit. A better way to add POSIX to
any XP or Vista installation is to run Cygwin.
This little freebie installs in seconds, and supports a variety
of popular Linux-based programs that have been rebuilt specifically
to run with Cygwin. While Cygwin won't give you full support for
all Linux software on your Windows PC, it will open the door to
some basic Linux features.
--Robert Strohmeyer