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.