Please help me... i try to install openVPN when i type command: source ./vars i
get message "NOTE: If you run ./clean-all, I will be doing a rm -rf on /etc/openvpn/easy-rsa/2.0/keys". But when i try type command: ./build-ca get message like this
"Please edit the vars script to reflect your configuration,
then source it with "source ./vars".
Next, to start with a fresh PKI configuration and to delete any
previous certificates and keys, run "./clean-all".
Finally, you can run this tool (pkitool) to build certificates/keys"
what that mean and how to enter right command?

Thank you.

I would suggest you read one of the guides up at http://library.linode.com/search?query=openvpn

Pick the distribution of linux that you are running and look through the guide for it

thank for u respone.