The Free Software Foundation may publish new, revised versions of the GNU Free Documentation License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. See http://www.gnu.org/copyleft/.

Each version of the License is given a distinguishing version number. If the Document specifies that a particular numbered version of this License "or any later version" applies to it, you have the option of following the terms and conditions either of that specified version or of any later version that has been published (not as a draft) by the Free Software Foundation. If the Document does not specify a version number of this License, you may choose any version ever published (not as a draft) by the Free Software Foundation.

Perl

The Perl scripting language is ideal for creating cron scripts that deal with text, or that exchange data between two locations. It can easily filter text files, and also coordinate with other scripts and other commands on the Unix command line.

If you’re using Mac OS X or Linux, you have Perl already installed. Learn the basics of this venerable and powerful scripting language. Automate your routine command-line tasks, and save time for writing more Perl scripts!