In Qualys SSL test always warn me that the root certificate is an extra download and can be safely removed.
However, from Comodo website, their guide on installing cert on nginx is
NGINX Needed for this task: * PEM encoded certificates (Root, Intermediate(s) and Domain/Device) COMBINE (CONCATENATE) MULTIPLE CERTIFICATES INTO ONE FILE
You know, they are a CA and be the authentic answser. So, which one I should trust?
Updates: I also gather more advises from other CA as well
Suggest adding the root cert
Suggest no need the root cert
So so confusing?