To have the script run as root, you either need to be root when you execute it (or from root's crontab), or use sudo when the script is executed.
As almut said, use system commands for most of the work. Just plan out how you would do it on the command line, then wrap those commands in Perl using one of the many methods (system, exec, backticks)... which one you use depends on various things, like do you want the script to wait for that command to finish before continuing, etc. You can read up on those commands just about everywhere. The easiest way is to google 'perl <command>'.
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Are you posting in the right place? Check out Where do I post X? to know for sure.
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Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
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Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
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Want more info? How to link
or How to display code and escape characters
are good places to start.
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