If you are using RHEL, CentOS, or Fedora on a graphical environment, then with the GNOME control center, we can interact with the NetworkManger service. We can also access network settings from the notifications area icon. This can be seen in the following screenshot on the RHEL 7.1 system:

To access the same, but through the control center, we can use the SUPER key. In the search dialog box, we will enter control network, as seen in the following screenshot:

Once we have accessed Network Settings, it's possible to simply disable all wireless interfaces with the traditional Airplane Mode. In this way, you can be assured of not plummeting to your certain death during takeoff and landing and still enjoy your game of Candy Crush Saga.

On the left-hand side panel, we can view the current known interfaces and the Network proxy settings. Here, we can add web proxies if required. On the RHEL 7.1 system we are using in this book, we see two...