Chrony
Chrony is a versatile implementation of the Network Time Protocol (NTP). It can synchronize the system clock with NTP servers, reference clocks, and manual input using wristwatch. It is designed to deliver accurate and secure time even in unstable network conditions.
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Chrony: Network Time Protocol Implementation
A versatile NTP implementation for accurate and secure timekeeping, even in unstable networks.
What is Chrony?
Chrony is a versatile implementation of the Network Time Protocol (NTP) used to synchronize computer clocks with NTP time servers, hardware reference clocks, and manual input. It is designed to deliver accurate, secure, and reliable time even in unstable network conditions.
Some key features of Chrony include:
- It can synchronize the system clock faster and with better time precision than other NTP implementations.
- It compensates for fluctuations in network latency and clock frequency.
- It can be configured to increase the reliability over wireless or dial-up connections.
- It runs well even on systems with intermittent network access such as laptops or virtual machines.
- It provides authentication between NTP clients and servers using keys to prevent accidental or malicious protocol attacks.
Chrony is suitable for systems which are not continuously connected to the internet or lie behind a firewall and cannot run regular NTP. It can be useful as a client-only implementation in large organizations where the time servers internal to the organization are too distant to provide accurate time.
Chrony Features
Features
- NTP client and server
- Accurate clock discipline algorithm
- Support for reference clocks
- Command line interface and monitoring program
- Runs as a daemon process in user space
- Small footprint and low resource usage
Pricing
- Open Source
Pros
High accuracy and reliability
Good performance in unstable network conditions
Secure authentication using keys
Easy to configure and manage
Open source with active development
Cons
Limited historic data for diagnostics
Less widely deployed than older NTP implementations
Requires configuration changes from default NTP setup
Not compatible with Windows time sync by default
Official Links
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