63 lines
2.0 KiB
HTML
63 lines
2.0 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<HTML>
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<HEAD>
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<META NAME="GENERATOR" CONTENT="SGML-Tools 1.0.9">
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<TITLE>BASH Programming - Introduction HOW-TO: Very simple Scripts</TITLE>
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<LINK HREF="Bash-Prog-Intro-HOWTO-3.html" REL=next>
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<LINK HREF="Bash-Prog-Intro-HOWTO-1.html" REL=previous>
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<LINK HREF="Bash-Prog-Intro-HOWTO.html#toc2" REL=contents>
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</HEAD>
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<BODY>
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<A HREF="Bash-Prog-Intro-HOWTO-3.html">Next</A>
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<A HREF="Bash-Prog-Intro-HOWTO-1.html">Previous</A>
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<A HREF="Bash-Prog-Intro-HOWTO.html#toc2">Contents</A>
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<HR>
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<H2><A NAME="s2">2. Very simple Scripts</A> </H2>
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<P> This HOW-TO will try to give you some hints about shell script
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programming strongly based on examples.
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<P> In this section you'll find some little scripts which
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will hopefully help you to understand some techniques.
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<P>
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<H2><A NAME="ss2.1">2.1 Traditional hello world script</A>
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</H2>
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<P>
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<BLOCKQUOTE><CODE>
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<PRE>
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#!/bin/bash
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echo Hello World
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</PRE>
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</CODE></BLOCKQUOTE>
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<P>
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<P> This script has only two lines.
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The first indicates the system which program
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to use to run the file.
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<P> The second line is the only action performed by this script,
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which prints 'Hello World' on the terminal.
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<P> If you get something like <I>./hello.sh: Command not found.</I>
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Probably the first line '#!/bin/bash' is wrong, issue whereis bash or see
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'finding bash' to see how sould you write this line.
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<H2><A NAME="ss2.2">2.2 A very simple backup script</A>
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</H2>
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<P>
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<BLOCKQUOTE><CODE>
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<PRE>
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#!/bin/bash
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tar -cZf /var/my-backup.tgz /home/me/
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</PRE>
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</CODE></BLOCKQUOTE>
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<P> In this script, instead of printing a message on the terminal,
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we create a tar-ball of a user's home directory. This is NOT intended
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to be used, a more useful backup script is presented later in this
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document.
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<HR>
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<A HREF="Bash-Prog-Intro-HOWTO-3.html">Next</A>
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<A HREF="Bash-Prog-Intro-HOWTO-1.html">Previous</A>
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<A HREF="Bash-Prog-Intro-HOWTO.html#toc2">Contents</A>
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</BODY>
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</HTML>
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