OverTheWire Wargames Natas:
http://overthewire.org/wargames/natas/
Sample codes or files presented in the video:
https://github.com/700hackers/overthewire-natas-wargames
Watch the tutorials for the whole series:
https://www.youtube.com/playlist?list=PL8uHzh-Yy0BQLHGAX_E8d-mVIMxHuO4eP
