1www.example.org.crt COMODORSADomainValidationSecureServerCA.crt COMODORSAAddTrustCA.crt AddTrustExternalCARoot.crt >> www.example.org-bundle.crt See details in https://helpdesk.ssls.com/hc/en-us/articles/203427642-How-to-install-a-SSL-certificate-on-a-NGINX-server