21 lines
1.1 KiB
Plaintext
21 lines
1.1 KiB
Plaintext
chrony is a versatile implementation of the Network Time Protocol (NTP). It can
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synchronise the system clock with NTP servers, reference clocks (e.g. GPS
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receiver), and manual input using wristwatch and keyboard. It can also operate
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as an NTPv4 (RFC 5905) server and peer to provide a time service to other
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computers in the network.
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It is designed to perform well in a wide range of conditions, including
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intermittent network connections, heavily congested networks, changing
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temperatures (ordinary computer clocks are sensitive to temperature), and
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systems that do not run continuosly, or run on a virtual machine.
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Typical accuracy between two machines synchronised over the Internet is within
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a few milliseconds; on a LAN, accuracy is typically in tens of microseconds.
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With hardware timestamping, or a hardware reference clock, sub-microsecond
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accuracy may be possible.
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Two programs are included in chrony, chronyd is a daemon that can be started
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at boot time and chronyc is a command-line interface program which can be used
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to monitor chronyd’s performance and to change various operating parameters
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whilst it is running.
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