The Command Line Murders
Fun gamified way to learn and memorize common Linux commands. Set as a murder mystery / whodunnit, you are tasked to solve an ongoing murder by utilizing the command line.
Bandit Wargames
A wargame aimed at absolute beginners, teaching a little problem solving and some Linux basics.
TryHackMe
Open and free way to get into Cybersecurity, with gamified and hands-on learning about real-world applications of Cybersecurity.
Hack the Box
Another platform to increase your skills in cybersecurity. Free and with a huge community (+ options for certifications!).