You would think this one would be an easy one to find
on the net, but ...

First, before anyone shakes the finger at me,

        $ ls -al /etc/rc.d/rc.local
        -rwxr--r--. 1 root root 1013 Aug 29 11:20 /etc/rc.d/rc.local

How do you get rc.local to execute at boot time?

I can execute it from the command line with and it does
what I want:

       # systemctl start rc-local

but it doesn't want to start at boot.

Many thanks,
-T

$ systemctl -la | grep -i rc-local

rc-local.service 
 
        loaded failed   failed    /etc/rc.d/rc.local Compatibility