How to use/update certbot certificate

I always hated doing this for Nginx, because Nginx was behind Apache on creating a helper script, and those are always less reliable than straight terminal commands anyway.  This command gets around annoying things and gives you:

1. One single certificate that doesn't randomly change its name to 001, 002, etc.
2. Multiple domains in the same certificate, for Nginx config copy/paste easiness
3. No annoying questions asked by the script, just update my stuff please

Here is the command:

./certbot-auto certonly --nginx --expand --agree-tos -d octobeta.com -d www.octobeta.com  --cert-name=nonewfilesplz

(The -d is for domain, and you can have unlimited of these parameters.)

Useful information which is printed out:

IMPORTANT NOTES:
 - Congratulations! Your certificate and chain have been saved at:
   /etc/letsencrypt/live/nonewfilesplz/fullchain.pem
   Your key file has been saved at:
   /etc/letsencrypt/live/nonewfilesplz/privkey.pem

Use those two locations in your Nginx config like so:

server {
    # ...etc

    ssl_certificate /etc/letsencrypt/live/nonewfilesplz/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/nonewfilesplz/privkey.pem; # managed by Certbot

    # ...etc

}