Setting up NGNIX to redirect from non-www to www

Okay so the site was redirecting www to be non-www. But since there are quite a few backlinks that where www. Need to change the WordPress site so that it is www. Currently it is non-www. The issue was when changing the site config file for Ngnix.

server {
       listen 80;
       server_name localhost 999.999.99.99;
       root /var/www/;
       if ($http_host != "") {
                 rewrite ^$request_uri permanent;

Then restart Ngnix, that part works fine. But when updating the site URL and home URL to be both www in the WordPress options db table. I can not log into the dashboard site.

I know I will need to run a site update so that all links are www from non-www.

Any help would be appreciated.

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Simplest solution is to create two “servers” one for non-www and one for www. In the non-www enter this config:

    listen       80;
    return       301$request_uri;

and on the www just your original config, but server_name with only

Just for info: return 301 [url] means that you permanently redirect client to the url.