Please put <code>-Tags around your code, so it can be displayed correctly.

<code>
#! /usr/bin/perl
# just an example
use strict;
use warnings;

print "Hello World!\n";
</code>
[download]

Also have a look at Writeup Formatting Tips. Thanks.

Updated questions and hints which came first to my mind:

• You wrote: The script runs a system function and returns data. I am stuck, it returns nothing!

  So, what is returning nothing?
  Your CGI-Script or the system call?

• It looks like you're not using strict and warnings. Please use them, they help you to write better code.
• You use start_body and end_html from the CGI module; they already provide the opening and the closing body tags.

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Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.