chrony

chrony is an implementation of the Network Time Protocol (NTP). It's a replacement for the ntpd, which is a reference implementation of the NTP. It runs on Unix-like operating systems (including Linux and macOS) and is released under the GNU GPL v2.[3] It's the default NTP client and server in Red Hat Enterprise Linux 8 and SUSE Linux Enterprise Server 15,[4][5] and available in many Linux distributions.[6][7][8]

chrony
Screenshot of chronyc
Original author(s)Richard Curnow[1]
Developer(s)Miroslav Lichvar, Red Hat[1]
Stable release
3.5.1 / August 20, 2020 (2020-08-20)[2]
Repository
Written inC
Operating systemUnix-like
TypeTime synchronization
LicenseGNU GPL v2
Websitechrony.tuxfamily.org

Comparison with the reference implementation

Unlike NTPsec, chrony was implemented from scratch.[1] It was designed to synchronize time even in difficult conditions such as intermittent network connections (such as laptops) and congested networks.[1] Unlike ntpd, it supports synchronizing the system clock via hardware timestamping, improving accuracy of time synchronization between machines on a LAN.[3] It also supports synchronization by manual input, and can perform time correction within an isolated network.[3]

See also

References
  1. Linux Foundation (2017-09-28). "CII Audit Identifies Most Secure NTP Implementation". Linux Foundation. Archived from the original on 2018-02-03. Retrieved 2019-10-08.
  2. "News". chrony.tuxfamily.org. Retrieved 2020-08-20.
  3. "Comparison of NTP implementations". chrony.tuxfamily.org. Retrieved 2019-10-08.
  4. "Migrating to chrony". Red Hat, Inc. Retrieved 2019-10-08.
  5. "Time Synchronization with NTP". SUSE. Retrieved 2019-10-08.
  6. "chrony". Debian. Retrieved 2019-10-08.
  7. "chrony". Fedora Packages. Retrieved 2019-10-08.
  8. "net-misc/chrony". Gentoo Packages. Retrieved 2019-10-08.
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