I am running Peppermint 5 and i have just installed openvpn via a terminal using:
sudo apt install openvpn network-manager-openvpn network-manager-openvpn-gnome
So could someone tell me how i might add/configure the vpn connection through NetworkManager please.
Go to network connections, then click add. Select OpenVPN from the drop down menu. Click Create. Set the gateway to whatever is the OpenVPN server. The specifics of the configuration are dependent on how the server operator set things up. Generally, it will be password or certificates. If it is password, use the username and password assigned to you by the VPN provider. If it is certificates, you should download the OpenVPN configuration files from the VPN provider and point the User certificate at whatever certificate was provided. Similarly, point the CA certificate at the provided certificate authority. The IPv4 settings should usually be left on automatic.