Installing an SSL certificate from 3 files - is there an instruction?

Question

Digital certificates

I ordered an SSL certificate, I received an email:


Last year, I myself installed them in VPS somehow, I now have two old files there, one with the .crt extension, the second .key. But I remember that in one of these files I concatenated 3 certificates at once. In general, I somehow freaked out, but I don’t remember how. Google mostly gives tutorials on Let's Encrypt. Maybe there is a normal instruction somewhere on how to make ssl work on the site from these 3 files that were sent to me?

Answer 1

csr is a request for a certificate, it is no longer needed,
most likely, you have concatenated the certificate and the root certificate into the certificate file
, there should still be a private key, which, with the key extension, is a separate file

Answer 2

For ssl to work, 2 files are needed:
Certificate cert.pem
Private key private.key

Answer 3

If you didn't fill out the CSR yourself, then you weren't given the key :) Of these three files, you can't make it work :) Will your car drive if it doesn't have a crankshaft in its engine?