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Say that ntp is an important package to install

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Catherine Luse
2019-12-31 14:04:53 -07:00
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content/rancher/v2.x/en/installation/requirements/_index.md
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@@ -32,6 +32,8 @@ For details on which OS and Docker versions were tested with each Rancher versio
All supported operating systems are 64-bit x86.
The `ntp` (Network Time Protocol) package should be installed. This prevents errors with certificate validation that can occur when the time is not synchronized between the client and server.
> **Note:** Some distributions of Linux derived from RHEL, including Oracle Linux, may have default firewall rules that block communication with Helm. This [how-to guide]({{<baseurl>}}/rancher/v2.x/en/installation/options/firewall) shows how to check the default firewall rules and how to open the ports with `firewalld` if necessary.
If you plan to run Rancher on ARM64, see [Running on ARM64 (Experimental).]({{<baseurl>}}/rancher/v2.x/en/installation/options/arm64-platform/)