On Linux systems, initialization (init) scripts manage the state of system services during system startup and shutdown. When the system goes through its runlevels, the System V init system starts and stops services as configured. While this tried-and-true technology has been around since the dawn of Unix, you can now create modern and efficient CentOS 6 init scripts by using Upstart, an event-based replacement for System V init. 

There are many products that let you run Linux on ARM and are not targeted at the mobile market. The ODROID-U2 is an extremely small form factor ARM-based computer that packs enough grunt to replace a modest desktop.

Ubuntu, Mint, and other glamorous Debian derivatives get all the attention. So why not go to the source and try Debian itself?

In the last Android tutorial, we covered using a thread to draw to a Canvas in Android. In this tutorial, we'll build further on that code to handle touchscreen events, and specifically to move the drifting bubble around the screen in response to the user touching the screen.