I add my own favorite: Cheat Sheets on PacketLife.com ^[1] has some very nice ones on network technology topics.

Cheat sheets are in PDF format. You are welcome to use and redistribute them as you please, so long as they remain intact and unmodified.

Currently there are six categories:

• Protocols: BGP, EIGRP, First Hop Redundancy, IEEE 802.11 Wireless, IEEE 802.1X, IPsec, IPv4 Multicast, IPv6, IS-IS, OSPF, Spanning Tree
• Applications: tcpdump, Wireshark Display Filters
• Reference: Common Ports, IP Access Lists, Subnetting
• Syntax: Markdown, MediaWiki
• Technologies: MPLS, Quality of Service, VLANs
• Miscellaneous: Cisco IOS Versions, Physical Terminations

Examples: Common Ports ^[2] and IPv6 ^[3] (links to PDF files)

I wish to use this at some point... for now though, I'm a nano dork but thought it might be handy for some here:

Printable (PDFs)

QWERTY:http://locobox.googlepages.com/vi-vim-cheat-sheet-qwerty.pdf Dvorak:http://locobox.googlepages.com/vi-vim-cheat-sheet-dvorak.pdf

alt text http://locobox.googlepages.com/vi-vim-cheat-sheet.gif ^[1]

Learning Vim the Pragmatic Way. ^[1]

http://jrmiii.com/attachments/Vim.png

Source ^[1]

OpenSSH Quick Reference

• Author: Jialong He ^[1]
• Download (PDF) ^[2]

Protocol encapsulation chart from Wildpackets (PDF format) ^[1]

Just my 2 cents.

VMware Infrastructure 3 Reference Card ^[1]

AWK, NAWK, GAWK Cheat Sheet ^[2]

Rosetta Stone for UNIX ^[3]

Google.com (I know - it's not a list with two-word commands, but it saves my behind every time).

Computer Hardware Chart ^[1] (Geekologie):

A while ago I found this helpful Linux/Unix Command Cheat Sheet ^[1].

Nice Windows 2008 technology posters available here:

Windows Server 2008 Component Posters ^[1]

• Windows Server 2008 Feature Components
• Windows Server 2008 Active Directory Components

These two posters, originally published in the July 2007 issue of TechNet Magazine, provide a strong visual tool to aide in the understanding of various features and components of Windows Server 2008. One poster focuses exclusively on powerful new Active Directory technologies, while the other provides a technical look at a variety of new features available in Windows Server 2008 (such as Server Core, Network Access Protection, and more).

PowerShell Quick Reference ^[1]

And a list with cheat sheets for different languages, systems and so on.

http://www.cheat-sheets.org/

Windows 2003 Command Line Reference ^[1] is more of a 50 lb manual than a cheat sheet, though if someone has something lightweight with the compressed syntax, that would rock...

SQL Server Cheat Sheet ^[1]

The SQL Server cheat sheet is a one-page A4 printable document, designed to provide a quick reference for SQL Server. A description of what is on the cheat sheet follows, or if you are impatient, you can go straight to the full size SQL Server cheat sheet.

• Data Types and Conversion
• Functions
• Creations

Download link: PDF file ^[2]

Not free, but definitely worth mentioning.
xkcd ^[1] have a wearable Linux cheat sheet ^[2].

Life's cheat sheet http://909sickle.com/s/lifes-cheat-sheet/lifes-cheat-sheet.png ^[1]

Source ^[2]

Simple RAID Cheat Sheet ^[1]

I'm sure it's just because I don't mess with RAID that often, but when I do need it, this is immensely helpful.

• Subversion SVN Cheat Sheet ^[1]
• Larger set of computing topics ^[2].

System Administrator Interview Cheat Sheet ^[1]

This regular expression cheat sheet in PDF format ^[1] has been pretty helpful in the past.

Unix Toolbox ^[1]

This document is a collection of Unix/Linux/BSD commands and tasks which are useful for IT work or for advanced users. This is a practical guide with concise explanations, however the reader is supposed to know what s/he is doing.

I enjoy keyboard shortcuts

Windows: http://www.intelliadmin.com/blog/2006/04/windows-keyboard-shortcuts-you-never.html

VI: http://www.keyxl.com/aaab462/105/VIM-Text-Editor-keyboard-shortcuts.htm

Cheatsheet

Perl http://juerd.nl/site.plp/perlcheat

Useful Vim commands ^[1] (PDF).

Linux Unix Cheat Sheets ^[1]

Ghantoos Memo ^[2]

Command Line Fu ^[3]

OpenBSD 101 ^[4]

http://www.connectionstrings.com

I use it all the time for system administrator and developer related tasks, especially when trying to make an applications talk to a database other than what it was originally designed for and the support isn't all that great.

As an admin (and after) I find that I need to often create tools for the browser.

I'm not a designer (nor do I desire to be one), but I have found VisiBone ^[1] cheat sheets immensely helpful:

• HTML tags ^[2]
• JavaScript regular expressions ^[3]

Rewrite Rules Cheat Sheet ^[1]

PECL Regex Cheat Sheet:

I created a Vim cheatsheet in various formats a couple of years ago: Vim Cheatsheet ^[1]

Found this whimpy list ^[1] of links to various sheets for various technologies...there's only, oh, I dunno, three dozen of these...

Apache 1.3 Quick Reference Card

Link: PDF file ^[1] (2 pages)

Set Operations for Unix. some of the most useful stuff I've seen to date. Not only it speeds things up greatly, but it educates you how to do things in a smarter way than the CS101 'solve it for one case, put it in a loop' strategies.

Website ^[1] with explanations

Shorter version, for hanging on the cubewall: DOWNLOAD ^[2]

Linux Command wallpaper

alt text http://www.letslearnlinux.com/suseblog/wallpaper/big/linux-wallpaper-for-beginners.jpg ^[1]

DevCheatSheet.com ^[1] - Huge collection of cheat sheets and reference cards for developers (and admins)

More for web development, but I just added the following excellent resource to my bookmarks this morning.

http://www.tripwiremagazine.com/tools/cheat-sheets/front-end-web-developers-toolbox.html

All of my other favorites have already been mentioned.

Oracle Server 9i Quick Reference Guide

Link: PDF file ^[1] (0.9 MB)*

_{* It's not really a cheat sheet, there are 37 pages, but it is very compressed information.}

Command-line Cheat Sheets ^[1]

And with an iPhone app ^[2].

There is a ton of good ones on www.drp.co.za ^[1]

WordPress Template/Theme Editing ^[1]

Many sheets on many topics including HTML, JavaScript, JSP, CSS, Delphi, Ada, C, C#, C++, etc. ad nauseam ^[2] (a listing of sheets from many sources)

Also and perhaps most important for admins even if it's not really a single-page format: Rosetta Stone for Unix ^[3] which lists equivalent commands for AIX, A/UX, DG/UX, FreeBSD, HP-UX, IRIX, Linux, Mac OS X, NCR Unix, NetBSD, OpenBSD, Reliant, SCO OpenServer, Solaris, SunOS 4, Tru64, Ultrix and UNICOS

That last one was very useful when dealing with disks - I was looking for something like parted, not for "divvy" which is what SCO OpenServer uses.

Blog Post: PowerShell Cheat Sheet Redux - the PDF version ^[1]

Two page cheat sheet for some common group of tasks

I keep the Vi Reference Mug on my desk just in case I forget something.

Also, I saw a cheat sheet here for Subversion but not one for Git. Try this one ^[1].

Exchange 2007 Management Shell Quick Reference ^[1] - it's a start, anyway.

• OpenSSL Cheat Sheet ^[1] (webpage)

• jQuery 1.4.2 Visual Cheat Sheet ^[2] (various formats)

Real World FIND usage:

The original page is gone (also linked from Linux Today ^[1]), but I found it again on web.archive.org. http://web.archive.org/web/20090426000044/http://www.wagoneers.com/UNIX/FIND/find-usage.html

Whenever I had a question about unix find syntax or needed an example, I'd reference this.

find / -type f -name *.jpg  -exec cp {} . \;
find . -type f -size +10000 -exec ls -al {} \;
find . -atime +1 -type f -exec mv {} TMP \; # mv files older then 1 day to dir TMP
find . -name "-F" -exec rm {} \;   # a script error created a file called -F 
find . -exec grep -i "vds admin" {} \;
find . \! -name "*.Z" -exec compress -f {} \;
find . -type f \! -name "*.Z" \! -name ".comment" -print | tee -a /tmp/list
find . -name *.ini
find . -exec chmod 775 {} \;
find . -user xuser1 -exec chown -R user2 {} \;
find . -name ebtcom*
find . -name mkbook
find . -exec grep PW0 {} \;
find . -exec grep -i "pw0" {} \;
find . -atime +6
find . -atime +6 -exec ll | more
find . -atime +6 -exec ll | more \;
find . -atime +6 -exec ll \;
find . -atime +6 -exec ls \;
find . -atime +30 -exec ls \;
find . -atime +30 -exec ls \; | wc -l
find . -name auth*
find . -exec grep -i plotme10 {};
find . -exec grep -i plotme10 {} \;
find . -ls -exec grep 'PLOT_FORMAT 22' {} \;
find . -print -exec grep 'PLOT_FORMAT 22' {} \;
find . -print -exec grep 'PLOT_FORMAT' {} \;
find . -print -exec grep 'PLOT_FORMAT' {} \;
find ./machbook -exec chown 184 {} \;
find . \! -name '*.Z' -exec compress {} \;
find . \! -name "*.Z" -exec compress -f {} \;
find /raid/03c/ecn -xdev -type f -print
find /raid/03c/ecn -xdev -path -type f -print
find / -name .ssh* -print | tee -a ssh-stuff
find . -name "*font*"
find . -name hpmcad*
find . -name *fnt*
find . -name hp_mcad* -print
find . -grep Pld {} \;
find . -exec grep Pld {} \;
find . -exec grep Pld {} \;
find . -exec grep PENWIDTH {} \; | more
find . -name config.pro
find . -name config.pro
find /raid -type d ".local_sd_customize" -print
find /raid -type d -name ".local_sd_customize" -print
find /raid -type d -name ".local_sd_customize" -ok cp /raid/04d/MCAD-apps/I_Custom/SD_custom/site_sd_customize/user_filer_project_dirs {} \;
find /raid -type d -name ".local_sd_customize" -exec cp /raid/04d/MCAD-apps/I_Custom/SD_custom/site_sd_customize/user_filer_project_dirs {} \;
find . -name xeroxrelease
find . -exec grep xeroxrelease {} \;
find . -name xeroxrelease
find . -name xeroxrelease* -print 2>/dev/null
find . -name "*release*" 2>/dev/null
find / -name "*xerox*" 2>/dev/null
find . -exec grep -i xeroxrelease {} \;
find . -print -exec grep -i xeroxrelease {} \;
find . -print -exec grep -i xeroxrelease {} \; > xeroxrel.lis
find . -exec grep -i xeroxrel {} \;
find . -print -exec grep -i xeroxrel {} \;
find . -print -exec grep -i xeroxrel {} \; | more
find /raid/03c/inwork -xdev -type f -print >> /raid/04d/user_scripts/prt_list.tmp
find . -exec grep '31.53' {} \;
find . -ls -exec grep "31/.53" {} \; > this.lis
find . -print -exec grep "31/.53" {} \; > this.lis
find . -print -exec grep 31.53 {} \; > this.lis
find . -exec grep -i pen {} /;
find . -exec grep -i pen {} \;
find . -print -exec grep -i pen {} \; | more
find . -exec grep -i pen {} \;
find . -atime +6 -exec ll | more \;
find . -atime +6 -exec ll \;
find . -atime +6 -exec ls \;
find . -atime +30 -exec ls \;
find . -atime +30 -exec ls \; | wc -l
find . \! -name '*.Z' -exec compress -f {} \;
find . -name 'cache*' -depth -exec rm {} \;
find . -name 'cache*' -depth -print | tee -a /tmp/cachefiles
find . -name 'cache[0-9][0-9]*' -depth -print | tee -a /tmp/cachefiles
find . -name 'hp_catfile' 'hp_catlock' -depth -print | tee -a /tmp/hp.cats
find . -name 'hp_catfile' -name 'hp_catlock' -depth -print | tee -a /tmp/hp.cats
find . -name 'hp_cat*' -depth -print | tee -a /tmp/hp.cats
find . -name 'hp_cat[fl]*' -depth -print | tee -a /tmp/hp.cats
find /raid -name 'hp_cat[fl]*' -depth -print
find . \! -name '*.Z' -exec compress -f {} \;
find . -name '*' -exec compress -f {} \;
find . -xdev -name "wshp1*" -print
find . -xdev -name "wagoneer*" -print
find . -name "xcmd" -depth -print
find /usr/contrib/src -name "xcmd" -depth -print
find /raid -type d -name ".local_sd_customize" -exec ls {} \; 
find /raid -type d -name ".local_sd_customize" \
   -exec cp /raid/04d/MCAD-apps/I_Custom/SD_custom/site_sd_customize/user_filer_project_dirs {} \;