I have added a Free SSL cert from Comodo. It was easy, but there were a few issues first.
The thing was, when I created the key and the CSR I used a higher bit. 8192-bit key. The request passed and worked great …until I tested Safari and Chromium. Both return that the cert was invalid. I didn’t try to make a new key+CSR in Terminal incase there were more things in my command that they didn’t like. So, I used the online tool @ my host. At least I could chose 4096.