Source: StackOverflow
By: roman-cheplyaka
Note: Full credit goes to the author and source website you see above.
sh (or the Shell Command Language) is a programming language described by the POSIX standard. It has many implementations (ksh88
, dash
, ...). bash
can also be considered an implementation of sh (see below).
Because sh is a specification, not an implementation, /bin/sh is
a symlink (or a hard link) to an actual implementation on most POSIX systems.