My certificate issuing authority has provided me with 5 PEM files. 3 of these are part of a chain. One of the files is all 3 chain files as a single file.
The fifth file appears to be the certificate itself.
The application I'm using was looking for a .key file and a .cert or .crt file. I was able to use openSSL to make .crt file version of all the pem files. Do I also need a .key version? Id so, where do I install the various certificate files? Are filenames important?