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Update content/en/docs/setup/production-environment/tools/kubeadm/install-kubeadm.md

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Co-authored-by: Lubomir I. Ivanov <neolit123@gmail.com>
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serewicz
2022-04-18 11:25:13 -05:00
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@@ -69,7 +69,7 @@ For more details please see the [Network Plugin Requirements](/docs/concepts/ext
## Check required ports ## Check required ports
These These
[required ports](/docs/reference/ports-and-protocols/) [required ports](/docs/reference/ports-and-protocols/)
need to be open in order for Kubernetes components to communicate with each other. You can use NetCat to check if a port is open. For example: need to be open in order for Kubernetes components to communicate with each other. You can use tools like netcat to check if a port is open. For example:
```shell ```shell
nc 127.0.0.1 6443 nc 127.0.0.1 6443