One of the most novel and differentiating features of a UNIX system is its command line. With just a few keystrokes, including a bit of "glue", you can use the command line to combine the finite set of UNIX utilities into innumerable, impromptu data transforms. These articles will teach you the basics of the UNIX shell and discover how you can use the command line:

• Command the power of the command line
• Do everything right from the command line

Ksplice applies kernel patches on-the-fly - no reboot required — in a fraction of a second. Here's a hands-on guide to performing painless system updates. Learn how to patch a live kernel and give reboots the boot.

Some UNIX protocols need investigation to understand what they are doing and what information they are exchanging. In this article, we will take a look at techniques for performing detailed analysis of the protocols in use on your UNIX network.

You don't have to break into a Watergate office to uncover the secrets of UNIX power users. There's an informant, and he's spilling the beans. Learn why Environment Variables, the dot file, and the Secure Shell (SSH) are very important.

Nginx is a lightweight, high performance web server/reverse proxy and e-mail (IMAP/POP3) proxy. It runs on UNIX, GNU/Linux, BSD variants, Mac OS X, Solaris, and Microsoft Windows. According to Netcraft, 6% of all domains on the Internet use nginx webserver.