Resources

General #

• TryHackMe — cybersecurity platform focused on guided learning
• OverTheWire — linear-style challenges

Red Team #

• HackTheBox — cloud-hosted vulnerable machines to hack
• VulnHub — vulnerable machines for self-hosting on VirtualBox or VMWare
• OffSec Proving Grounds — three hours free per day of pentesting labs (or pay)

Blue Team #

• LetsDefend — blue team training

CTFs #

• PicoCTF — retired CTF challenges in every common CTF category
• pwn.college — learning platform focused on binary exploitation
• CTF Handbook — Wiki for CTFs

Programming #

• CodeAcademy — tons of programming languages to learn on their website
• RealPython — various tutorials on Python

Virtualization #

• Kali Linux — Linux distro with hacking tools pre-loaded
• VirtualBox and VMWare Workstation — VM hypervisors
• Charles ISO Mirror — ISO Mirrors for various machines that could be used.