System Clock Synchronization Client and Serverhttp://chrony.tuxfamily.org/Chrony is a pair of programs which are used to maintain the accuracy of thesystem clock on a computer. The two programs are called chronyd and chronyc. Chronyd is a daemon which runs in background on the system. It obtainsmeasurements via the network of the system clock’s offset relative to timeservers on other systems and adjusts the system time accordingly. For isolatedsystems, the user can periodically enter the correct time by hand (usingChronyc). In either case, Chronyd determines the rate at which the computergains or loses time, and compensates for this. Chronyd implements the NTPprotocol and can act as either a client or a server. Chronyc provides a user interface to Chronyd for monitoring its performance andconfiguring various settings. It can do so while running on the same computeras the Chronyd instance it is controlling or a different computer.