This selection of articles can be downloaded as a PDF book (or as html only)

System

• How to encrypt and decrypt files with a password
• How to migrate from Subversion to Git
• How to use the pkgsrc packages collection on Mac OS X
• How to Protect SSH From Multiple and Parallel Coordinated Attack
• How to set up ATEN UC-232A USB-to-Serial for OS X
• How to launch Terminal from keyboard shortcut on OS X
• How to install nginx, mysql, php 5.4 with php-fpm on OSX Lion
• How to effectively copy files between servers using scp and compression
• Interesting and useful shell commands

Databases

• Useful MySQL commands
• How to Research your MySQL table sizes
• How to Recover MySQL root Password
• How to Kill long running MySQL processes
• How to setup MySQL master-slave replication
• How to change MySQL user password

Applications

• How to easily install Java Runtime on OS X
• How to install .dmg applications from the command line
• How to reset the OS X Dock

Networking

• How to set up Apache server and SSH client to allow tunneling SSH over HTTP(s)
• How to create a DHCP setup to separate PXE and normal clients
• How to enable iOS AirPrint with any printer supported by CUPS
• How to SSH via HTTP proxy
• How to convert Bind zone file raw binary format to text

eMail

• How to set Up Thunderbird Against Exchange 2007

Hacking

• How to install Node.js
• How to add new project to Github
• Basic Unix programming
• GCC warnings explained