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bash shell - technical definition
(Bourne Again SHell shell) A command line processor for Unix from the Free Software Foundation. It is the de facto command processor in Linux. See Bourne shell and Free Software Foundation.
The Unix Command Line
The bash shell is the default command line processor on the Macintosh, and launching Terminal.app displays this terminal window. The Microsoft Windows XP file shows up because it runs in a Parallels virtual machine on this Mac, and PVS is a Parallels configuration file.
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