I have been provided with a Comodo SSL certificate to deploy with Apache/ModSSL on Ubuntu 14.04. All I got was an email with links like this. I was not provided with a private key. It appears the enrolment process can be done entirely from Comodo's website.
Comodo support tells me I have to generate the private key and CSR separately. I get "mismatch" errors when I use a newly generated private key as SSLCertificateKeyFile:
SSL Library Error: error:0B080074:x509 certificate routines:X509_check_private_key:key values mismatch
How can I deploy the certificate?