What does this -J8 mean?

Question

I am learning how to set up a server and came across this command -J8. I have not found anywhere an explanation of why this command. Could someone help me understand what he does? Thanks in advance

Answer 1

The -j8 is a parameter passed pro compiler to use 8 processor cores during build, to speed up the process.

For questions about command line utility parameters in general: use man <comando> shows the utility manual, which is quite comprehensive for the most common utilities and generally solves any superficial doubt.