Note: I’m working on a set of posts on the limits of NTP time syncing with Linux, but before I do that I wanted to write up an overview of the basic terms and concepts involved. This was originally part of a giant post on accuracy, and I’m going to break it out into its own post instead, and then post the other pieces over the next week. So, suppose you have a bunch of Linux systems on a network and you want to keep their clocks in sync. It’s a common enough problem, and there are lots ...