certbot搞HTTPS

systemctl enable -now snapd.socket
systemctl start snapd
systemctl status snapd
snap install core
snap refresh core
yum remove certbot
ln -s /var/lib/snapd/snap /snap
snap install --classic certbot
ln -s /snap/bin/certbot /usr/bin/certbot
cat /etc/nginx/conf.d/
certbot --nginxxxxxxxxxxx systemctl start nginxshell