$ sudo make-cadir /etc/openvpn/easy-rsa

設定例

$ sudo vim /etc/openvpn/easy-rsa/vars
export KEY_COUNTRY="JA"
export KEY_PROVINCE="Tokyo"
export KEY_CITY="Shinagawa"
export KEY_ORG="octaviadata"
export KEY_EMAIL="admin@octaviadata.com"
export KEY_OU="MyOrganizationalUnit"