.. include:: ../header.txt

.. _shell:

***********************
The Shells
***********************

In :title:`Linux for Programmers and Users` Chapter 5, we take a closer look at
what the shell does for us.  Of necessity, we have already used many of the
shell discussed here.  We will thus clarify some concepts and present several
new features of the shell.  Many of commands presented here are commands that
are built into the shell.  The commands from Chapter 5 that are stand alone
programs are ones that relate to how commands are entered to the shell.  We
also introduce shell script programming, which is covered in more detail in
Chapter 6.

**Contents**

.. toctree::
   :maxdepth: 2

   shell_choice
   echo
   metachar
   here
   redirect
   wildcard
   pipe_shell
   tee
   sleep
   command_sub
   sequence
   variables
   jobs
   script
   source