From: http://openvpn.net/index.php/open-source/documentation/howto.html#pki
/etc/openvpn/easy-rsa/# . ./vars
clients-name:# ./build-key clients-name
/etc/openvpn/ccd/ if applicableca.crtclients-name.crtclients-name.keyclient-confs/thoughtbit-client.confrc.openvpn (for linux systems without an init script)