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How to Set Up chrony for Time Sync
Chrony is a versatile implementation of the Network Time Protocol (NTP) that is designed for systems that are not always connected to the Internet. It provides accurate time synchronization for both local and remote systems. This tutorial will guide you through the installation and configuration of chrony for time synchronization on your Linux system.
1. Installing chrony
First, check if chrony is already installed on your system by running:
chronyc trackingIf it’s not installed, you can install it using your package manager:
- For Ubuntu:
sudo apt update sudo apt install chrony - For CentOS:
sudo yum install chrony
2. Configuring chrony
The main configuration file for chrony is located at /etc/chrony/chrony.conf. Open this file to edit it:
sudo nano /etc/chrony/chrony.confIn this file, you can specify NTP servers to synchronize time from. For example:
server 0.pool.ntp.org iburst
server 1.pool.ntp.org iburstThe iburst option helps speed up the initial synchronization.
3. Starting and Enabling chrony
After configuring chrony, start the chrony service with:
sudo systemctl start chronydTo ensure it starts automatically on boot:
sudo systemctl enable chronyd4. Checking Synchronization Status
To check the synchronization status of your system clock, use:
chronyc trackingThis command provides information about how well your system is synchronizing with the configured NTP servers.
5. Monitoring and Adjusting
You can monitor the performance and statistics of chrony using:
chronyc sourcesThis outputs a list of NTP sources that chrony is using to synchronize time.
6. Conclusion
By following this tutorial, you have successfully installed and configured chrony for accurate time synchronization in Linux. Chrony is particularly advantageous for systems that frequently go offline or have intermittent connections. Explore additional features of chrony to further optimize your time synchronization strategy!
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