Shell - Revision history

Franks at 21:22, 17 July 2007

2007-07-17T21:22:39Z

← Older revision		Revision as of 14:22, 17 July 2007
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	as you can see, there is where you will change items such as your [[PATH]]		as you can see, there is where you will change items such as your [[PATH]]


			== Scripting ==

			If you want to learn shell scripting, we recommend you start with [[sed]], [[awk]] and [[grep]]. All three are very powerful and each will take years to master. An example of each:

			This will substitute any line with the word root in it in /etc/passwd with an empty space in place of "root":
			$ [[sed]] s/root//g /etc/passwd

			This will show you the fifth field in /etc/passwd if you seperate each field with a colon:

			$ [[awk]] -F: '{print $5}' /etc/passwd

			Finally, this will show you every line in /etc/passwd with the word "root" in it
			$ [[grep]] root /etc/passwd

Pbug: point out that shells only interpret programming instructions

2007-03-12T19:15:53Z

point out that shells only interpret programming instructions

← Older revision		Revision as of 12:15, 12 March 2007
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	A shell is both a command language and a programming language that provides an interface to any UNIX based operating system [[UBO]].		A shell is both a command language and a programming language ([[interpreter\|interpreted]]) that provides an interface to any UNIX based operating system [[UBO]].

	The most popular shell by far is [http://www.gnu.org/software/bash/ bash] which is provided by the GNU team. There are several other popular shells, depending on your requirements and skillset:		The most popular shell by far is [http://www.gnu.org/software/bash/ bash] which is provided by the GNU team. There are several other popular shells, depending on your requirements and skillset:

Franks: New page: A shell is both a command language and a programming language that provides an interface to any UNIX based operating system UBO. The most popular shell by far is [http://www.gnu.org/...

2007-03-09T05:02:04Z

New page: A shell is both a command language and a programming language that provides an interface to any UNIX based operating system UBO. The most popular shell by far is [http://www.gnu.org/...

New page

A shell is both a command language and a programming language that provides an interface to any UNIX based operating system [[UBO]].

The most popular shell by far is [http://www.gnu.org/software/bash/ bash] which is provided by the GNU team. There are several other popular shells, depending on your requirements and skillset:

* csh
* tcsh
* sh
* ash
* zsh

to see what shell you are using:

$ echo $SHELL

which is one of the [[variables]] that can be found in your ''env''ironment. You can get a list of all of your environment variables:

$ env

as you can see, there is where you will change items such as your [[PATH]]