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Top Forums UNIX for Dummies Questions & Answers Significance of different shells? Post 302838851 by syregnar86 on Tuesday 30th of July 2013 03:52:51 PM
Old 07-30-2013
Significance of different shells?

I'm taking a LINUX and UNIX class and we are using bash as the shell in terminal. On my mac-book I use zsh only because my professor had a pretty cool start-up file for it.

It has benefited me in becoming familiar with different shells. However, I'm having a hard time understanding the purpose of the shell and why there are so many shells out there and the importance or instance of using one over the other.

I understand zsh is very powerful. However, I see the same with bash. I wrote a few simple scripts in bash as well as zsh and see that they are very familiar in syntax. I've also found out that it doesn't matter what shell I'm in when I want to run a script.

For example, #!/bin/bash, stating this in the top of my bash script still allows me to run it in zsh.

It also seems that no matter what shell your currently in the commands at the command line are always the same as far as navigating around.

Therefore, what's the purpose of the shell and instances/advantages of using one over the over?

Last edited by syregnar86; 07-30-2013 at 04:59 PM..
 

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COMMAND-NOT-FOUND(1)					    http://en.opensuse.org/Sco					      COMMAND-NOT-FOUND(1)

NAME
command-not-found - A command-not-found handler SYNOPSIS
command-not-found {binary_name} {repository} ARGUMENTS
The following arguments are required: binary_name The name of binary you are looking for. repository The name of repository for search. For most cases, use zypp DESCRIPTION
command-not-found handler is designed to tell users which package contains a missing command. The handler is integrated to bash(1) and zsh(1) shells and is not necessary to call it directly. Just type a name of the command in your favourite shell and you'll get a result. If you consider c-n-f handler useless, just add unset command_not_found_handle to your profile or remove the command-not-found package. Handler doesn't call the command-not-found binary directly, it only prints info about it. If you want to invoke it automatically, just add export COMMAND_NOT_FOUND_AUTO=1 to your bash profile. EXAMPLE
: NORMAL USAGE For example you want to try blender, because you have heard that is an amazing program. So just type blender in shell: $ blender You get the following output: The program 'blender' can be found in the following package: * blender [ path: /usr/bin/blender, repository: zypp (openSUSE 11.1-0) ] Try installing with: sudo zypper install blender bash: blender: command not found SEE ALSO
scout(1) AUTHOR
Pavol Rusnak <stick@gk2.sk> Developer http://gitorious.org/opensus 08/07/2009 COMMAND-NOT-FOUND(1)
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