Practice
I'm just going to paste a bunch of sites. I'll fix it up and make it look nice some time next week.
Stay up to date with the world of linux:
https://www.linux.com/
Learn about current cyber security news
https://www.reuters.com/news/archive/cybersecurity
Learn hands on cyber security techinques. The virtual machines for this site are already in the Virtual Machine directory with the directions on how to install them. Yeah I know, I'm awesome.
https://seedsecuritylabs.org/index.html
The following is a link to a website in which you can buy some great course and learn a whole lot. Don't EVER pay full price for a course. Just put it in your wishlist, wait a few days, and then check again; There will be a sale.
https://www.udemy.com/
Practice your cyber security skills.
https://0x00sec.org/
Core hacking course on youtube
https://www.youtube.com/playlist?list=PLMGUdaTHpFQLmSAk5_cTM8Y502hhVpeNf
Linux Commands
https://www.mediacollege.com/linux/command/linux-command.html
Web hacking
https://www.pentesterlab.com/
Over the wire wargames
https://overthewire.org/wargames/