All tutorials are free unless otherwise noted.

Normal Unix User

• Very Simple Unix Commands
  
  
• VERY basic UNIX tutorial - This guide is Intended for people with pretty much zero knowledge of Unix.
  
  
• Webteacher Beginning Tutorial - This is a CGI tutorial. They say: This tutorial will walk you through the basics of creating CGIs with Perl on a Unix platform. Unlike other tutorials I've read, this does not assume you know anything about CGIs, Perl, or Unix.
  
  
• Intro to UNIX - This is an old page, but will get you started with Unix.
  
  
• A nice Unix tutorial for beginners
  
  
• UNIXhelp for Users - Starts with very basic stuff and moves on to more detailed topics.
  
  
• Web Reference UNIX Tutorial - This is a Fourteen section tutorial, each of which addresses a fundamental aspect of UNIX computing.
  
  
• A Comprehensive Guide to FreeBSD - They say this is: An Absolute Beginners Guide to FreeBSD. This section gives an overview of what FreeBSD is, and how to utilize resources for obtaining more information about FreeBSD.
  
  
• Amazon books on Unix, on Linux
  
  

Unix System Administrator

• Unix System Security - This is a several part overview of how to secure your Unix system.
  
   
• Tutorials on various utilities Unix System Administrators use - This is the DreeBSD documentation page. You will be able to find a great deal of information here.
  
  
• USAIL Unix System Administration Independent Learning - They say: The USAIL project is both an independent study course for prospective system administrators and a reference resource.
  
  
• Tutorials on Solaris/SunOS Modems and Terminals also UNIX Sysadmin Resources
  
  Samba Administrator's Handbook
  Getting Samba to work is challenging -- this book helps.
  
  Amazon Books for Unix System Administration
  
  Amazon Books for Linux System Administration

Other Tutorial Lists

• Unix training - Articles on getting training, online degress, and related topics.

On Unixtools: 

• Perl, CGI, C, C++ tutorials
  
  This page is a short list of links to various programming and scripting tutorials.
• Basic HTML Tutorials
  
  As you know HTML is the language of the world wide web. This article goes into a bit of background of HTML and includes links to tutorials.
• Basic Intro to Javascript
  
  Perhaps the most important and widely used non-static programming language is Javascript.
• Java tutorials
  
  Java was originated by a farmer in the middle east who needed to stay awake. It later merged with a big company to come up with Java Soap... Well, maybe not.
• SQL Tutorials
  
  A brief list of links to SQL tutorials and help
• Boot Linux from CD
  
  You can get the free Linux OS (operating system) running on a computer system by booting Linux from a Linux installation CD (or DVD) and installing Linux. And you can also run Linux by booting a system from a Linux live CD / DVD.