Eager Eagle

you do have an nginx process with PID 2511847 using the port

get more info with

ps aux | grep 2511847

or kill it, if you need to spawn a new one with the right configuration

find out which process is really binding to 443 if you don’t recognize that port as being used

sudo ss -unapt | grep 443

This is such an underutilized and neglected behavior.

The very least a config parser should do is to log a warning.

because of garbage like that I always use the long option names in scripts, even when the short one would be obvious