"A true wizard doesn't just run processes, a true wizard knows
how to communicate with those processes through signals to stop,
restart, and even kill processes. This may sound like arcane and
obscure knowledge, but if you follow along, you'll be managing your
processes like an adept in no time.
"The first articles in this series of things wizards should know
(but books often don't cover) explained some Linux and shell
fundamentals, discussed standard input/output and other open files,
covered redirection of standard I/O and higher-numbered file
descriptors, touched on FIFOs and a few other tips..."