How to get SSL certificate via ACME.SH?

Situtation I:

If the nginx is ready and works well, do it as below:

Step 1: stop the nginx temporary

systemctl stop nginx

Step 2:

acme.sh --issue  -d example.com  --standalone

Step 3: install the certificate

acme.sh --installcert -d example.com --key-file /root/private.key --fullchain-file /root/cert.crt

Step 4: start the nginx service again

systemctl start nginx
systemctl enable nginx

Ok, it’s done.