Categories CheatSheet 3 posts CyberSecLabs 1 post HackTheBox 2 categories , 151 posts Challenges 3 posts Machines 148 posts HackThisSite 2 categories , 14 posts Basic missions 11 posts Realistic 3 posts OverTheWire 1 category , 6 posts Bandit 6 posts PwnTillDawn 12 posts TryHackMe 136 posts VulnHub 6 posts