Unix shell

A Unix shell is a command-line interpreter (or shell) that provides a traditional Unix-like command line user interface.

Description

Users direct the operation of the computer by entering commands as text for a command line interpreter to execute, or by creating text scripts of one or more such commands.

Users typically interact with a Unix shell using a terminal emulator, however, direct operation via serial hardware connections, or networking session, are common for server systems.

All Unix shells provide:

• Filename wildcarding
• Piping
• Here documents
• Command substitution
• Variable
• Control structures for condition-testing and iteration

See also

• Bash (Unix shell) - a popular Unix shell.
• Shell (computing)
• Unix-like

External links

• Unix shell @ Wikipedia

bash

• Run a bash shell script @ ss64.com
• Shell Script Basics @ developer.apple.com