Issued the command below, and was prompted to (U)update cert or (C)confirm - can anyone point me to a command line switch that automatically answers this question? Needed for an automated sequence.
/usr/bin/certbot certonly --webroot --webroot-path /var/www/http02/000-http02.example.com/COMMON/root --expand --cert-name http02.example.com --domain site1.example.com
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator webroot, Installer None
You are updating certificate http02.example.com to include new domain(s):
You are also removing previously included domain(s):
Did you intend to make this change?
(U)pdate cert/(C)cancel: