sync high-availability install-kubeadm production-environment/_index

Author: asa3311

content/zh-cn/docs/setup/production-environment/_index.md

@@ -361,11 +361,11 @@ simply as *nodes*).
   这一规模是基于你要运行的 Pod 和容器个数来确定的。
   如果你自行管理集群节点，这可能意味着要购买和安装你自己的物理设备。
 <!--
-- *Autoscale nodes*: Read [Cluster Autoscaling](/docs/concepts/cluster-administration/cluster-autoscaling) to learn about the
+- *Autoscale nodes*: Read [Node Autoscaling](/docs/concepts/cluster-administration/cluster-autoscaling) to learn about the
   tools available to automatically manage your nodes and the capacity they
   provide.
 -->
-- **节点自动扩缩容**：查阅[集群自动扩缩容](/zh-cn/docs/concepts/cluster-administration/cluster-autoscaling)，
+- **节点自动扩缩容**：查阅[节点自动扩缩容](/zh-cn/docs/concepts/cluster-administration/cluster-autoscaling)，
   了解可以自动管理节点的工具及其提供的能力。
 <!--
 - *Set up node health checks*: For important workloads, you want to make sure

content/zh-cn/docs/setup/production-environment/tools/kubeadm/high-availability.md

@@ -257,7 +257,7 @@ option. Your cluster requirements may need a different configuration.
    connection:
 
    ```shell
-   nc -v <LOAD_BALANCER_IP> <PORT>
+   nc -zv -w 2 <LOAD_BALANCER_IP> <PORT>
    ```
 
    A connection refused error is expected because the API server is not yet

content/zh-cn/docs/setup/production-environment/tools/kubeadm/install-kubeadm.md

@@ -123,7 +123,7 @@ You can use tools like [netcat](http://netcat.sourceforge.net) to check if a po
 可以使用 [netcat](http://netcat.sourceforge.net) 之类的工具来检查端口是否开放，例如：
 
 ```shell
-nc 127.0.0.1 6443 -v
+nc 127.0.0.1 6443 -zv -w 2
 ```
 
 <!--