Description:

A pair of programs for keeping computer clocks accurate.
chronyd is a background (daemon) program and chronyc is a
command-line interface to it. Time reference sources for
chronyd can be RFC1305 NTP servers, human (via keyboard and
chronyc), and the computer's real-time clock at boot time
(Linux only). chronyd can determine the rate at which the
computer gains or loses time and compensate for it whilst no
external reference is present. chronyd's use of NTP servers
can be switched on and off (through chronyc) to support
computers with dial-up/intermittent access to the
Internet. chronyd can also act as an RFC1305-compatible NTP
server.