Linux:
https://tryhackme.com/r/room/linuxfundamentalspart1
https://tryhackme.com/r/room/linuxfundamentalspart2
https://tryhackme.com/r/room/linuxfundamentalspart3
https://academy.hackthebox.com/module/complete/18
https://www.youtube.com/playlist?list=PLBf0hzazHTGMh2fe2MFf3lCgk0rKmS2by
Windows:
https://tryhackme.com/r/room/windowsfundamentals1xbx
https://tryhackme.com/r/room/windowsfundamentals2x0x
https://tryhackme.com/r/room/windowsfundamentals3xzx
https://academy.hackthebox.com/module/details/49
https://academy.hackthebox.com/module/details/167
Networking:
https://www.youtube.com/playlist?list=PLxbwE86jKRgMpuZuLBivzlM8s2Dk5lXBQ
https://academy.hackthebox.com/module/complete/34
https://tryhackme.com/r/room/whatisnetworking
https://tryhackme.com/r/room/introtonetworking
https://tryhackme.com/r/room/introtolan
- Tools:
https://tryhackme.com/r/room/furthernmap
https://tryhackme.com/r/room/wiresharkthebasics
https://tryhackme.com/r/room/trafficanalysisessentials
- Attacks:
https://tryhackme.com/r/room/layer2
https://tryhackme.com/r/room/wifihacking101
https://www.handsonsecurity.net/resources.html (Network Security)
Cybersecurity Fundamentals:
https://skillsforall.com/course/introduction-to-cybersecurity?courseLang=en-US