Cheat Sheets for System Administrators?

Solution 1:

I add my own favorite: Cheat Sheets on PacketLife.com 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 and IPv6 (links to PDF files)

Common Ports Cheat Sheet (PDF)

Solution 2:

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

Solution 3:

Learning Vim the Pragmatic Way.

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

Solution 4:

Map of the internet

Source