download vpn client for ubuntu 20.04 code example
Example: install vpn client for ubuntu 20.04 gui
$ sudo apt install network-manager-openvpn network-manager-openvpn-gnome openvpn openvpn-systemd-resolved -y
$ sudo apt install network-manager-openvpn network-manager-openvpn-gnome openvpn openvpn-systemd-resolved -y