Bourne Shell in Linux Programming

Introduction of Bourne Shell

 The Bourne shell is a shell, or command-line interpreter, for computer operating systems.Bourne developed by Stephen Bourne at Bell Labs, it was a replacement for the Thompson shell, whose executable file had the same name sh. It was released in 1977 in the Version 7 Unix release distributed to colleges and universities.

 Although it is used as an interactive command interpreter, it was also intended as a scripting language and contains most of the features that are commonly considered to produce structured programs.


if ( $days -gt 365 ) then
   echo This is over a year.

Feature of Bourne Shell

      Use of wild cards

      Input and output variables for customizing the shell environment

      A set of shell variables for customizing the shell environment

      Background execution of commands

      Command set,loop and conditional statement support.

      Scripts can be invoked as commands by using their filename

      Allow both synchronous and asynchronous execution of commands

      provides a set of built-in commands

      provides local and global variable scope

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