http://www.unixmen.com/basics-networkmanager-command-line-tool-nmcli/

nmcli
    d[evice]
        s[show]
            list of device info (!!! with DNS)
                enp4s0  ethernet  connected               Wired connection 1
                    DNS: 192.168.1.1
                    lo      loopback  connected (externally)  lo
                    ---
                    gpd0    gp
                    tun0    openconnect
    c[onnection]
        s[how]
        up <con-name>