CTF (Capture The Flag) is a game that requires you to get a hidden "flag" from the given places. And usually the people who find the most flag in a given time will be the winner
It was a outdoor game, but now we are playing a computer games, you needs to find a flag from the given documents, websites, or computer
we will play that in the website blow
https://picoctf.org/
This is an easier one, and we will mostly play that, and if we finish that, we can play the blow one
http://pwnable.kr/play.php
This one is more challenging and it requires some basic knowlege about Computer
And if we ca finish that, we can play real CTF in hackthebox, it includes real competition, but it's a kind of too difficult
if you are interested in that, feel free to content me by the hidden email below
(hint: try inspect or view source in Browser