Hi,
This is a standard SSL certificate file used by apache. You can find many instructions on the internet like this one:
http://wiki.ocsinventory-ng.org/index.php?title=Howtos:Install_OCS_on_debian#Create_the_certificate
The only precaution to take is the field cn. It must contain the full name of the server (fqdn) as myserverocs.mydomain.com
Regards