I tried the above link but it wasn’t working! I followed steps described in the tutorial but no success

My Server OS is Ubuntu running nginx

If you want to redirect your IP address to your domain name, the server block should look like this:

server {
    listen 80;
    server_name IP;

    return 301 http://domain.com$request_uri;
}

so:

server {
    listen 80;
    server_name 128.199.126.36;

    return 301 http://www.tutshunt.com$request_uri;
}

Thank you It solved my problem