Free resources are like pizza margherita: they put a smile on your face.
Here’s one for every day of the month.
1. Tecmint
2. Linuxize
3. nixCraft
4. It's FOSS
5. Linux Hint
6. FOSS Linux
7. LinuxOPsys
8. Linux Journey
9. Linux Command
10. Linux Academy
11. Linux Survival
12. Linux Handbook
13. Ryan's Tutorials
14. LinuxFoundationX
15. LabEx Linux For Noobs
16. Conquering the Command Line
17. Guru99 Linux Tutorial Summary
18. Eduonix Learn Linux From Scratch
19. TLDP Advanced Bash Scripting Guide
20. The Debian Administrator's Handbook
21. Cyberciti Bash Shell Scripting Tutorial
22. Intellipaat Linux Tutorial For Beginners
23. Digital Ocean Getting Started With Linux
24. Learn Enough Command Line To Be Dangerous
25. Cisco networking academy
26. NDG Linux Unhatched course
27. Learn Linux TV
28. Overthewire
29. Tryhackme
30. EDX.org
31. Youtube