Schools

Online cybersecurity schools and games

Hands-on practice

Hack the box

Hack The Box: tons of machines with walkthroughs to practice. Hack The Box Academy: quality theory courses with practice lessons. For beginners better to start on Academy since machines can be too difficult at first.

Cyber Mastery: Community Inspired. Enterprise Trusted.Hack The Box

Hack The Box: Labs

Hack The Boxapp.hackthebox.com

Hack The Box: Academy

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Over The Wire

Free wargames CTF-like to learn Linux and bash

OverTheWire: Wargamesoverthewire.org

OverTheWire

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Under The Wire

Free wargames CTF-like, inspired on OverTheWire but using Powershell

underthewire-reactunderthewire.tech

UnderTheWire

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TryHackMe

Online school with CTF labs and academy modules

TryHackMe | Cyber Security TrainingTryHackMe

TryHackMe

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Linux Journey

Learn Linux with exercises.

Linux Journey: Learn Linux with Free Linux Tutorial & CourseLabEx

Linux Journey