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Here I present an abbreviated explanation of the process of creating firewall and cluster objects. More detailed step-by-step guides are available in sections "Firewall Object" and "Cluster Object" of the Firewall Builder Users Guide.
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How To Become a UNIX command-line Wizard

Some good tips about becoming a command-line wizard...

It's easy to keep doing things the same way simply because you're used to it. Expanding your command-line resources can provide a big increase in your productivity and propel you toward becoming a UNIX command line wizard!

As a follow-up to Michael Stutz's excellent article, this article provides 10 more good habits to adopt that will improve your UNIX command-line efficiency. Learn about common errors and how to overcome them, and discover exactly why these 10 UNIX habits are worth picking up!

=> Learn 10 more good UNIX usage habits

Tips for Emacs Power Users

This is great post by Stevey Drunken about mastering Emacs text editor which is quite quite popular among UNIX hackers, computer programmers and power users:

Emacs is the world's best text editor. It's not just the best for editing program source; it's the best for any kind of text-editing. Mastering Emacs will make you more effective at writing and editing email, documentation drafts, blogs, HTML pages, XML files, and virtually everything else that requires any typing.

The tips in this little document are geared towards Emacs power-users. You should be familiar with the basics of launching and editing with Emacs, and you should already know the essentials of copying stuff into your .emacs file, and debugging things (or finding a friendly Emacs Wizard) when something goes wrong.

=> 10 Specific Ways to Improve Your Productivity With Emacs