A curated list of all capture the flag tips and strategies.
This project aims at collecting useful Python snippets in order to enhance pythoneers’ coding experiences. Please feel free to contribute if you have any awesome ideas for improvements to code snippets, explanations, etc. Covers Python 2 and 3.
A cheatsheet for using btrfs.
A cheatsheet for Python, which goes into quite a few of the commonly googled minutia nobody can remember. Can be read online (it's Markdown).
A handy cheatsheet for crafting SQL injection attacks against web apps backed by Oracle.
A handy cheatsheet for crafting SQL injection attacks against web applications.
A cheat-sheet for reverse engineering malware, by Lenny Zeltser.
A page of quick Subversion commands to carry out simple administrative and maintenance tasks in a repository. Good if you don't know what you're doing yet.
A CC-licensed cheatsheet for building with and programming the Arduino.
Everything you need to know about administering software RAID on Linux in a nutshell.
Archived.
A handy, all-in-one cheatsheet for Linux and UNIX environments. If you need to look up how to do something fiddly, this is a good place to look first.