Create SSL pem file

To make .pem file from SSL certificate, run

cat  yourdomain.key yourdomain.crt yourdomain.ca-bundle > yourdomain.pem

Here is the format

-----BEGIN RSA PRIVATE KEY----- 
(Private Key: domain_name.key contents) 
-----END RSA PRIVATE KEY-----
-----BEGIN CERTIFICATE----- 
(Primary SSL certificate: domain_name.crt contents) 
-----END CERTIFICATE----- 
-----BEGIN CERTIFICATE----- 
(Intermediate certificate: certChainCA.crt contents) 
-----END CERTIFICATE----

ssls/namecheap SSL example

cat domain_com_key.txt domain.com/domain.com.crt domain.com/domain.com.ca-bundle > ssl.pem