bash -

UNIX command shell written for the GNU project. T he program is distributed under the GPL. Bash is one of the most popular Unix systems shells. Is the default shell on most distrib utions of GNU / Linux and Mac OS X version 10.3, there are versio ns for most Unix systems. Bash is the default shell in Cygwin for Win32 systems. Bash allows interactive and batch jobs. Language bash allows you to define aliases, functions, provides flow control structures (if, while, for,.