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This article mainly introduces how to build a time server, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, let the editor take you to understand it.

1. Environmental requirements (chrony should be installed on both the client and server)

Two or more virtual machines are needed to act as servers and clients, all of which must have a yum source, and then install ntp separately. Because I use CentOS8, the download command is: yum install-y chrony

* * Note: * * I had a lot of problems when installing the yum source. I wasted a lot of time installing the Yum source in one way, and the installation was not successful. Later, I borrowed the classmate's method and succeeded. Record the successful installation process here:

a. First cd / etc/yum.repos.d/ take a look at the configuration file:

b. Delete these original Yum sources: rm-rf *

c. Check your own mirror version and go to the relevant website to download the matching yum source.

The website here is: https://developer.aliyun.com/mirror/?spm=a2c6h.25603864.0.0.50154ccaMggZGI, just copy the corresponding command

d. To install the Yum source, the command is:

Curl-o / etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo

If your mirror version is centos8, you can copy my command directly.

e. Test and install ntp (basically chrony after CentOS7) to see if the yum source is installed successfully.

At this point, the yum source is finally available

2. Find a reliable time server address

This step is searched on Baidu. I use ntp1.aliyun.com here.

After you find the right address, first use the virtual machine ping to see if it can be connected, and you can use it if you can.

3. Edit the chrony configuration file on the server

The command is vim chrony.conf

At this time, the first line of white text is a time server address he gave you, but we need to use our virtual machine to test whether we can ping before we can use it.

My result is that I can Ping, but it is relatively slow, because it is a foreign website.

Start the chronyd service and verify the time

Thank you for reading this article carefully. I hope the article "how to build a time server" shared by the editor will be helpful to everyone. At the same time, I also hope that you will support and pay attention to the industry information channel. More related knowledge is waiting for you to learn!

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