The $$ variable is the process id. It will be consistent through the run of the script. Each invocation of the script will get a different process id.<br><br>Brant Evans<br><br><div class="gmail_quote">On Mon, Feb 16, 2009 at 10:41 PM, Nathan England <span dir="ltr">&lt;<a href="mailto:nathan@paysonlinux.org">nathan@paysonlinux.org</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>
Hello Hello,<br>
<br>
 &nbsp; &nbsp; &nbsp; &nbsp;I am looking for an explanation of what &#39;$$&#39; is in bash.<br>
I can create a file or a directory, assign it to variables, but how much can I<br>
do before it changes, or what causes it to change?<br>
<br>
What exactly does it mean? Searching google for &#39;$$&#39; returns nothing useful.<br>
<br>
Nathan<br>
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