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Managing System Time with `chrony` in SUSE Linux Enterprise

In this hands-on lab, we will explore the configuration of `chrony` in SUSE Linux Enterprise. This tool is used to configure the Network Time Protocol (NTP), which is used to set the time on the server and allows the server to use an external reference to ensure its time is synchronized with other systems. This is important because an incorrect system time can impact certificates and keys.

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Path Info

Level

Beginner

Duration

15m

Published

Jan 10, 2020

Challenge

Using YaST, Add the Two Time Servers: `tick.jrc.us` and `tock.jrc.us`
1. Launch the YaST ncurses interface:
```
sudo yast
```
2. On the left select Network Services.
3. On the right select NTP Configuration.
4. Configure Start NTP daemon to Now and on Boot.
5. Tab to Configuration Source, select Dynamic, and arrow down to change it to Static.
6. Tab down to Servers and select Add.
7. Replace the existing server with tick.jrc.us, select Test to ensure it is responding, and then go to OK.
8. Tab down to Add, add tock.jrc.us, and select Test to make sure it is reachable.
9. Tab to Quit at the bottom of the page, until you have exited YaST completely.
Challenge

On the Command Line, Use `chronyc` to Verify the Time Servers Are Set and Responding
1. At the shell prompt, run the command:
```
chronyc sources -v
```
  You will see there is a third time server configured. This server is provided as a reference. Look at the output of the server at the 169 address and compare the output of tick and tock to ensure they are workking.
2. Run the command again, and check to ensure the RX count has increased and the servers are running.

Author

A Cloud Guru

The Cloud Content team comprises subject matter experts hyper focused on services offered by the leading cloud vendors (AWS, GCP, and Azure), as well as cloud-related technologies such as Linux and DevOps. The team is thrilled to share their knowledge to help you build modern tech solutions from the ground up, secure and optimize your environments, and so much more!

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