Welcome to STupid UNix TrickS, your source for tips and tricks for Unix-based systems. The major focus of this site is on Linux, but Solaris and OpenBSD are discussed as necessary.

A word of caution: do not try anything remotely similar to these things on any version of Windows, as you will miserably fail. Although there are products available for Windows which mimic Unix behavior (like the MKS toolkit), why settle for poor emulation when you can get the real thing?