After installing the SSL certificate on the Nginx web server, you need to check if it is installed correctly.
I installed the SSL certificate two months ago. The Sectigo ECC certificate.
Now I change the certificate files.
Previously, I put the site SSL certificate file content and the SSL-bundle file altogether. The final SSL certificate file is 4.36KB. It includes three certificates. The guide is from Comodo official site. Sectigo site has a similar guide here.
Now, I remove the last one. Just keep the site certificate and the middle one. Total size is 3.01KB.
The certificate I deleted from the old file is for USERTrust ECC Certification Authority. It is already included in the Trusted Root CA list.
Then, I tested the new certificate file, which has two certificates only, on different online SSL checking tools.