1. Connect your OPENVPN Server via ssh.
2. Change your directory to easy-rsa directory, mine is:  “/usr/share/doc/openvpn/examples/easy-rsa/2.0/
3. Run the commands below for to create a new rsa key of “Cihan Dogan”:
#. ./vars
#./build-key cihan.dogan
4. You will see the informations below, give your answers to the corresponding questions like below:
Generating a 1024 bit RSA [...]