Bash (short for "Bourne Again SHell") is an interactive command interpreter and programming language developed for Unix-like operating systems. It is designed as a 100% free alternative to the Bourne shell sh and other proprietary Unix shells.
Created in 1989 by Brian Fox for the GNU Project, it can operate within a terminal emulator or text window, where users can input commands to execute various tasks. It also supports the execution of commands from files, known as shell scripts, facilitating automation.
Relation to Microsoft
At the Microsoft Build 2016 conference, it was announced that Windows 10 will support Bash.[citation needed]