How to install a CA signed SSL certificate

Apache

(...)
SSLEngine on
SSLCertificateFile /path/to/website.crt
SSLCertificateKeyFile /path/to/private.key
SSLCACertificateFile /path/to/root_bundle.crt

What is the use of you might say ? It is primary the same as SSLCertificateChainFile but it also permits the use of the certificate in question to sign client certificates. That file "root_bundle.crt" will be sent along with the certificate to any clients that connect.
 

Nginx