CHchris_wot·May 3, 2016
Well that's just dandy. They are plagiarising.
http://packetlife.net/blog/2016/mar/9/dont-be-discouraged-pl...
All those PDFs that they have taken without permission and stored in their GitHub repository are the giveaway:
https://github.com/overthecs/overthecs.github.io/tree/master...
In Programming cheat sheets