There are several shells available in Linux, the default
shell is the Bourne Again SHell ---a pun on the name of Steve Bourne,
who was author of the traditional Unix shell, the Bourne shell.
A shell is a program that takes commands from the user and passes them
on to the kernel for processing.
all the other shells in Linux, the Bash shell is not only a great tool
for the command line, but also a scripting language.
Shell scripting allows you to automate tasks that in a normal way would
need typing in a lot of commands.
Some other shells are: the C shell, or Korn shell (the default on IBM's
AIX operating system); the ASH shell ( ash is useful for testing
scripts to be sh-compliant ), the TCSH shell ( completely compatible
version of the Berkeley Unix C shell ) and the new ZSH shell ( ZSH most
closely resembles KSH but includes many enhancements ).
open a terminal/console you actually open a shell and you are presented
with a bash prompt. A Bash prompt typically ends with a $ to show
you´re logged in as a normal user ( Only in SuSE it ends with
the user ). A Bash prompt ending with # shows that we are logged in as
root ( Same in SuSE this time ).
-- Dec 9 2003 ( Revised Dec 9 2005 ) --