D-Bus is a message bus system that provides an easy way for inter-process communication. It consists of a daemon, which can be run both system-wide and for each user session, and a set of libraries to allow applications to use D-Bus.
dbus is pulled and installed as a dependency of systemd and user session bus is started automatically for each user.
dbus-broker — A drop-in replacement for the libdbus reference implementation, which aims "to provide high performance and reliability, while keeping compatibility to the D-Bus reference implementation".
To enable dbus-broker as the system bus, enable
To enable as a user bus, a
dbus-broker.service user unit can be enabled either for a single user, or globally for all users.
Reboot for these settings to take effect.
Tips and tricks
Override dbus service
You can override dbus services in
If the service is already launched, the override will not work. We must kill the existing service's process, or launch our service earlier.
You can use this to always use a particular service when you have several installed providing the same well-known bus name.
- D-Feet — Easy to use D-Bus debugger GUI tool. D-Feet can be used to inspect D-Bus interfaces of running programs and invoke methods on those interfaces.
- QDbusViewer — GUI D-Bus debugger. Can be used to inspect D-Bus services and invoke methods on them.
You can also use busctl(1) from systemd.