You may choose or not to show the password. Why won't Network Manager manage my Networks? Select the IPv4 Settings tab. The nm-applet is there to manage your networking from the desktop c. Just below that is the wired tab. If more than one user is logged into Ubuntu, they will not see the icon and will not be able to use the applet functionality. The MAC address is written in the form of a set of 6 grouped hexadecimal digits, e.