first approach to network manager nmcli on Ubuntu 18.04

nmcli - command-line tool for controlling NetworkManager

nmcli is a command-line tool for controlling NetworkManager and reporting network status.
It can be utilized as a replacement for nm-applet or other graphical clients. nmcli is
used to create, display, edit, delete, activate, and deactivate network connections, as
well as control and display network device status.