One day I just back home ,when I open the door I got this pic. My dad is repair the light on the roof, my mom is stand aside to helping him. I am a Linux engineer for years, it take a lots of time to explain what Linux is and what am I doing with Linux for my job to my parents. Soooooooo many times but at that moment I realized that they finally know Linux is very useful.

As you see there is a Linux book under my dad’s feet help him to reach the roof.