Unix

· Unix Introduction - Rhys Haden
· List of Unix Programs - Answers.com
· Command-line Fu < The Best UNIX Commands On The Web
· Understanding File Permissions On Unix: A Brief Tutorial
· Linux System Administration Portal
· Rosetta Stone for UNIX FreeBSD, Linux, Solaris
· Unix Tutorial - CalTech
· Practical UNIX & Internet Security - O'Reilly
· Pratical Unix & Internet Security - O'Reilly
· COTSE - Unix Command Reference
· Unix Guru Universe
· Unix Reference Desk
· Description of Unix File System
· Unix system administration tutorial
· The Unix Auditor's Practical Handbook
· The CERN Unix User Guide
· Unix for Advanced Users
· Keyword Search the Single UNIX Specification
· Geocrawler.com - Search Unix Mailing Lists
· Unix Freeware
· About Unix
· Unix - ECN Knowledge Base @ Purdue
· X Windows System - ECN Knowledge Base @ Purdue
· X11 Tutorial
· WindowMaker.org
· SSH
· OpenSSH
· OpenSSH Man Pages
· ssh Tutorial
· Archive for "Using csh & tcsh"
· Vi Quick Reference - Learning the Vi Editor
· Vi Quick Reference - COTSE
· Vi CheatSheet - TechRepublic.com
· Vi Tutorial - ECN Knowledge Base @ Purdue
· The Vi/Ex Editor - UnixWorld
· Regular Expression - Wikipedia
· A Tao of Regular Expressions
· Regular Expressions
· Steve Ramsay's Guide to Regular Expressions
· Regular Expressions Fundamentals - ZyTrax
· Perl Regular Expressions
· What Regular Expressions Are and How You Can Benefit from Using Them
· Pine Information Center
· Norm Matloff's Introduction to the Mutt E-Mail Package
· Procmail.org
· Procmail Tips
· COTSE - grep Quick Reference
· grep Tutorial
· grep For Linguists
· dig
· host
· traceroute
· ping
· Cron Tutorial
· TFTP/BootP Server Configuration
· File Compression and Archiving with Gzip, Zip, and Tar
· COTSE - C Shell Quick Reference
· Lynx Information
· Sys Admin Journal
· The Story of the PING Program
· VNC - Virtual Network Computing from AT&T Laboratories Cambridge
· RealVNC - Open Source VNC
· TightVNC VNC-based Free Remote Control Solution
· Port Knocking - A System for Stealthy Authentication Across Closed Ports
· O'Reilly - Setting Your Shell Prompt
· SmokePing, mrtg, RRDtool - Tobi Oetiker's Projects
· Jabber - Open XML-Bsed IM Protocol
· OSDN Open Source Development Network
· [fmII] - freshmeat.net - Unix and cross-platform open source software
· O'Reilly Network -- Developers' Hub
· Webmin - Web-based Unix Sysadmin Tool
· Unix Security Tools
· Sudo Main Page
· Iptables Tutorial
· IP Filter - TCP-IP Firewall-NAT Software
· Logging File Analysis
· Nagios - Host and Service Monitor
· Computing Languages
· Search Tools for Web Sites and Intranets
· Webmin - Web-based Sys Admin
· The Book of Webmin - Or: How I Learned to Stop Worrying and Love UNIX
· NetAdminTools.com
· FSF/UNESCO Free Software Directory
· Free Shell Provider List

Linux

· The Linux OS - Everything About Linux
· Linux Network Configuration
· Guide to IP Layer Network Administration with Linux
· Hardening Linux
· Linux Man Pages Online
· Linux Manpage Viewer
· Linux MAN Pages - Linux Documentation with Search
· dList - Linux Daemons (Services) List
· Ubuntu Linux Essentials
· Linux Documentation Project
· Linux Network Administrators Guide
· Alphabetical Directory of Linux Commands - O'Reilly
· Linux Quick Reference to Useful Commands - O'Reilly
· Network Configuration on Linux
· Securing and Optimizing on Linux
· Performance Tuning on Linux
· Tuning Linux For Maximum Performance
· Advanced Routing and Traffic Control on Linux
· Fedora Core 3 Linux Services - Security Advice
· Common Linux Services
· Linux Serial Consoles and Reverse Telnet
· LinuxPlanet
· Linux Online
· LinuxHQ
· Linux Geek Net
· LinuxQuestions.org
· Red Hat Linux Manuals
· Linux Init Process and PC Boot Procedure
· LinuxPlanet - Tutorials - The Unix Shell - Part I - Introduction and Basic Concepts
· LinuxPlanet - Tutorials - The Unix Shell - Part II - Introduction,Standard Input and Output.
· The Linux Network Management Pages
· RPM Search
· Maximum RPM - Taking the Red Hat Package Manager to the Limit
· Linux@DUKE Yum Yellow Dog Updater, Modified
· Linux.DaveCentral.com Shareware, Freeware, Demos and Betas
· ZDTV Screen Savers - Linux Guide
· CNET - Linux Guide
· IndianZ Security and Hacks Downloads
· Using Linux as a Small Business Internet Gateway
· Fedora Project
· FedoraNEWS.ORG

FreeBSD

· The FreeBSD Project
· The FreeBSD Diary
· FreeBSD Hypertext Man Pages
· FreeBSD ON-LINE Man Pages
· OpenBSD Man Pages
· FreeBSD Handbook
· FreshPorts - The Place For Ports
· daemonnews - Bringing BSD Together
· ONLamp.com - FreeBSD Basics
· ONLamp.com - BSD DevCenter
· ONLamp.com - Securing FreeBSD
· Securing/Baselining FreeBSD
· IP Filter Based Firewalls HOWTO
· FreeBSD HowTo
· -[ DNSWATCH FreeBSD HowTo ]-

Sun

· System Administration Commands - Sun
· Sun Product Documentation
· Sun BigAdmin
· SunSolve OnLine
· Solaris Networking Commands
· Solaris Freeware
· Cisco How To Set Up and Debug the Syslog Facility on a Sun Workstation Using the RME syslogAnalyser Application


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