![]() ![]() In fact, all the tools that interact with NetworkManager – nmcli, nmtui, GNOME control center, the KDE applet, Cockpit – use this API. In this way, it can control almost every aspect of network configuration. For example, it can invoke methods, access properties or receive notifications via signals. The full documentation for the D-Bus API of NetworkManager is here.Ī client can connect to the NetworkManager service using the well-known name and perform operations on the exposed objects. Since this device is Ethernet, it also has a .Wired D-Bus interface containing other properties such as the link speed. We see that there are different interfaces the interface contains some properties common to all devices, like the state, the MTU and IP configurations. Using d-feet, a graphical tool to inspect D-Bus objects, we can see the object tree exposed by the NetworkManager service: D-Bus is a message bus system that allows processes to talk to each other using D-Bus, a process that wants to offer some services can register on the bus with a well-known name (for example, “”) and expose some objects, each identified by a path. In the second part it shows some practical examples: how to connect to a wireless network or to add an IP address to an interface programmatically via NetworkManager. This article first introduces the API of NetworkManager and presents how to use it from a Python program. Using this API, other applications can inspect, monitor and change the networking state of the system. However one of the advantages of NetworkManager is that it offers a powerful API. There are other tools that offer similar functionality. Its main purpose is to take care of things like setting up interfaces, adding addresses and routes to them and configuring other network related aspects of the system, such as DNS. ![]() NetworkManager is the default network management service on Fedora and several other Linux distributions.
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