Solve the Problem of no startup of rc. local file in centOS 7

Solve the Problem of no startup of rc. local file in centOS 7

Problem:

Today, I added nginx boot to the rc. local file. It didn't start after reboot! What exactly does centOS 7 do to rc. local?

Solution:

Check rc. local file properties and find that this file has no execution permission!
Then + x

Why is there no execution permission? Official instructions below

This file exists for compatibility issues
It seems that you need to start the instance through your own script later.

I didn't pay attention before. The original/etc/rc. d/rc. local is a link of/etc/rc. local!