nginx doesn't listen on port 80 twice?

Question

Edit: Read this, first:

Apart from the accepted answer, these errors occur when nginx is started without systemd. Kill nginx: ps -ax | grep nginx

Answer 1

You can't run two applications on the same address with the same port.

What you need to do is just change port of your application one with 80 and other application with some other port say 3000.

If you want your application to run only with 80 port than just remove the default file from

/etc/nginx/sites-available/default

and optionally also from

/etc/nginx/sites-enabled/default

You can run

sudo rm -rf /etc/nginx/sites-available/default

sudo rm -rf /etc/nginx/sites-enabled/default

Now you will be able to run one of your application on port 80