Learn & Understand POSIX shell

All credit goes to: grymoire.com, drewdevault.com, standard

These are my personal reference notes, I do not claim the examples or definitions below as originally authored by myself

What is POSIX?

POSIX (Portable Operating System Interface) is the standard UNIX shell - standard as in formally defined and shipped in a published standard, making shell scripts written for it portable. POSIX, is essentially a formalized version of Bourne.

It is found in /bin/sh, although it may be symlinked to bash