letsencrypt certbot-auto

nginx-default-conf

vim `/etc/nginx/sites-available/default`

server {
        listen 80 default_server;
        listen [::]:80 default_server ipv6only=on;

        root /usr/share/nginx/html;
        index index.html index.htm;

        server_name erlang.us;

        location / {
                try_files $uri $uri/ =404;
        }
}

server {
        listen 80;
        server_name wx.roccoliu.com;

        root /usr/share/nginx/html;
        index index.html index.htm;
        location / {
                try_files $uri $uri/ =404;
        }
}

git clone git@github.com:certbot/certbot.git