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Most common system shell in Unix/Linux environments. Integrates very well with other softwares having a command line interface. Widely used in CI scripts and buildscripts.

The shell is developed since 1988 by the Free Software Foundation.

In the decades, it has got most features of a high-level programming language, including exception handling, high-level data structures inculding dictionary and arrays, while it still preserved its close connection to the low-level OS functionality.

Its main purpose in the CI/DevOps world is to integrate the command-line interfaces of different softwares to each other.