This Solution article lists the steps to create a signed certificate using the CSR.


1. Create your private key and the Certificate Signing Request.


openssl req -new -newkey rsa:2048 -nodes -keyout iwx-app.infoworks.cloud.key -out iwx-app.infoworks.cloud.csr



The above OpenSSL command will generate the Certificate Signing Request (CSR) iwx-app.infoworks.cloud.csr and the private key file iwx-app.infoworks.cloud.key.


2. Submit the CSR to a Certification Authority ( CA )


Submit this CSR to a third-party CA like GoDaddy, DigiCert, CaCert, Cloudfare to get the signed certificate.


3. You would get a bundle with the below files if your CA is GoDaddy.


gd_bundle-g2-g1.crt is the intermediate crt

2687e78cd23e64ff.crt is the root crt
2687e78cd23e64ff.pem is pem file


https://uk.godaddy.com/community/SSL-And-Security/Which-certificate-is-root-and-which-is-intermediate/td-p/48311