A good tutorial to start using Mongoid in Rails 4 for total beginners

How to query array elements in MongoDB

How to replace bitmap images with scalable fonts in websites

Embedded linux boards

Awesome graphics

Personal blog of Martin Wimpress, an Archlinux developer

wkhtmltopdf and wkhtmltoimage are open source (LGPL) command line tools to render HTML into PDF and various image formats using the QT Webkit rendering engine

How to modify root or user crontab dynamically with a shell script

Complete explanation of how cron and contab work and how they set environmental variables.

Check if internet connection is available using wget --spider mode

An introduction to PGP