Unix shell

tcsh and sh shell windows on a Mac OS X Leopard[1] desktop

A Unix shell is a command-line interpreter or shell that provides a command line user interface for Unix-like operating systems. The shell is both an interactive command language and a scripting language, and is used by the operating system to control the execution of the system using shell scripts.[2]

Users typically interact with a Unix shell using a terminal emulator; however, direct operation via serial hardware connections or Secure Shell are common for server systems. All Unix shells provide filename wildcarding, piping, here documents, command substitution, variables and control structures for condition-testing and iteration.

  1. ^ Cite error: The named reference Vleck was invoked but never defined (see the help page).
  2. ^ Bourne, Stephen R. (October 1983). "The Unix Shell". BYTE. p. 187. Retrieved 30 January 2015.

Unix shell

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