What is the difference between kernel 4.9.0-8 and 4.9.130?

Question

linux

I looked at the repository of linux kernels and didn’t understand, let’s say the first digit is responsible for the completely sorted kernel, then I don’t know how to understand it! How to understand numbering, in terms of stability, so that you can safely program under linux with the correct structure of headers

Answer 1

https://semver.org/