Where can I take free information security courses for a novice system administrator?

Question

linux

Where can I take free information security courses for a novice system administrator?
Please share your experience and knowledge.
Thanks in advance!!!!

Answer 1

First, what do you want to do?
Principal directions:
1. Paper IS (here methodology, ISO, etc.)
2. Network IS (an offshoot of all kinds of cisok)
3. IB management (ordinary IS)
All directions have the right to life, they can flow one into another. The only thing is that for item 1 you need "500 hours of training", but it will not be free. Although not always.

Answer 2

I took a web penetration test course on geekbrains.ru, there are worthy lectures.