All available updates were applied to servers. They all got critical ones that required a reboot, most a kernel update, but some just dbus. D-Bus stands for “Desktop Bus”, but it isn’t limited to desktop environment thingies. It is really an inter-process communication mechanism that operates very much like DCOM or CORBA — it provides processes the means to expose object interface methods in an independent way so that other processes can invoke them. What dbus provides is essentially the canonical messaging model and the communication medium for exchanging the messages.
I don’t know why I decided to tell you all that today. I guess because I couldn’t think of anything funny to say.