If you’re installing openvpn on Ubuntu 12.10 and you stuck on “./clean-all”, here is how to fix it:
1. Restart the PC
2. Open the terminal and type sudo su to log in as root
3. move to the easy-rsa directory
4. type source ./vars (you’ll still get a message saying “NOTE: If you run ./clean-all ..”)
5. type ./clean-all
6. type ./build-ca