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<TITLE>BASH Programming - Introduction HOW-TO: Very simple Scripts</TITLE>
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<H2><A NAME="s2">2. Very simple Scripts</A> </H2>
<P> This HOW-TO will try to give you some hints about shell script
programming strongly based on examples.
<P> In this section you'll find some little scripts which
will hopefully help you to understand some techniques.
<P>
<H2><A NAME="ss2.1">2.1 Traditional hello world script</A>
</H2>
<P>
<BLOCKQUOTE><CODE>
<PRE>
#!/bin/bash
echo Hello World
</PRE>
</CODE></BLOCKQUOTE>
<P>
<P> This script has only two lines.
The first indicates the system which program
to use to run the file.
<P> The second line is the only action performed by this script,
which prints 'Hello World' on the terminal.
<P> If you get something like <I>./hello.sh: Command not found.</I>
Probably the first line '#!/bin/bash' is wrong, issue whereis bash or see
'finding bash' to see how sould you write this line.
<H2><A NAME="ss2.2">2.2 A very simple backup script</A>
</H2>
<P>
<BLOCKQUOTE><CODE>
<PRE>
#!/bin/bash
tar -cZf /var/my-backup.tgz /home/me/
</PRE>
</CODE></BLOCKQUOTE>
<P> In this script, instead of printing a message on the terminal,
we create a tar-ball of a user's home directory. This is NOT intended
to be used, a more useful backup script is presented later in this
document.
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