Bash is a sh-compatible command interpreter that executes commands read from standard input or from a file. Bash also incorporates useful features from the Korn and C shells (ksh and csh). Bash is ultimately intended to be a conformant implementation of the IEEE Posix Shell and Tools specification (IEEE Working Group 1003.2).
This package is required for your system to run! Remove it only if you are absolutely sure you know what you are doing!