What is bash?

[LemonMan]

What is bash? I know it has to do something with CLI.. but I've got no idea WTH is that.

[moonknight]

Bourn Again SHell its the language that you use for the konsole on linux

[Tor]

This is from Wikipedia:

Bash is a free software Unix shell written for the GNU Project. Its name is an acronym which stands for Bourne-again shell.[1] The name is a pun on the name of the Bourne shell (sh), an early and important Unix shell written by Stephen Bourne and distributed with Version 7 Unix circa 1978,[2] and the concept of being "born again". Bash was created in 1987 by Brian Fox. In 1990 Chet Ramey became the primary maintainer.[3]

Bash is the default shell on most systems built on top of the Linux kernel as well as on Mac OS X and it can be run on most Unix-like operating systems. It has also been ported to Microsoft Windows using the POSIX emulation provided by Cygwin and the one provided by MSYS, to MS-DOS by the DJGPP project and to Novell NetWare.

[WingedPanther]

One of the characteristics of Linux/Unix/BSD/etc is that the facilities are loosely associated. The result is that you can swap out kernels, command line interfaces, etc without significantly impacting the rest of the system. In *nix system, the command line interface is called a shell, of which bash is one option. This is different from, for instance, MS-DOS where the command-line interface is part of the OS and cannot be easily removed/replaced.