Unix Manuals
UNIX Manuals and Help Files
http://www.unix-manuals.com

A Brief History of Unix
History of Unix and causes for its popularity. "This document is designed to give people with no previous UNIX experience some sense of what UNIX is. This document will cover the history of UNIX and an introduction to UNIX."
http://www.hsrl.rutgers.edu/ug/unix_history.html

Der Keiler Unix Archive
An real-time updated archive of interesting unix-related mailing-lists and newsgroups: AIX-L, SunManagers, Tru64-UNIX-Managers, FreeBSD, comp.unix.solaris, comp.unix.shell, comp.unix.programmer, ...
http://unix.derkeiler.com

UNIX Guide
A comparative UNIX system administration guide, covering AIX, FreeBSD, HP-UX, LINUX , Solaris & Tru64 commands, tasks, links and news.
http://www.unixguide.net

The Unix Cockpit
The Unix Cockpit 3.0 is a nifty Open Source file manager for X11/Unix and runs under almost any Unix flavour.
http://www.klagges.com/uc.html

Mac OS X and Unix
This site is about scripting with a particular emphasis on OS X. Since much of this works in any unix interface, it may be of interest to unix scripters as well.
http://www.bradrice.com/wposx/

UNIX 4 OSX
Hintergrundinformationen und Tipps von Bruno Würgler zum Unix-Kern von Mac OS X für die Zielgruppe UNIX-Administratoren.
http://homepage.mac.com/bwuergler/

Unix Guru Universe
Largest UNIX System Administration Resource site, for beginners and gurus that are looking for UNIX sites on the internet.
http://www.ugu.com/

Building COM Components on UNIX
Discusses DCOM on the UNIX platform. It covers platform compatibility issues, the UNIX-specific architecture of DCOM, and implementing a DCOM component on UNIX. By Christian Gross, euSOFT.
http://msdn.microsoft.com/library/techart/msdn_unixcom.htm

Understanding Unix Concepts
Conceptual discussion of Unix and Unix-like operating systems.
http://www.uwsg.iu.edu/usail/index/concepts.html