Merge pull request #40789 from asa3311/sync-install-kubeadm.md

[zh-cn] sync install-kubeadm.md

Author: k8s-ci-robot

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

@@ -41,6 +41,7 @@ see the [Creating a cluster with kubeadm](/docs/setup/production-environment/too
 * Unique hostname, MAC address, and product_uuid for every node. See [here](#verify-mac-address) for more details.
 * Certain ports are open on your machines. See [here](#check-required-ports) for more details.
 * Swap disabled. You **MUST** disable swap in order for the kubelet to work properly.
+    * For example, `sudo swapoff -a` will disable swapping temporarily. To make this change persistent across reboots, make sure swap is disabled in config files like `/etc/fstab`, `systemd.swap`, depending how it was configured on your system.
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 * 一台兼容的 Linux 主机。Kubernetes 项目为基于 Debian 和 Red Hat 的 Linux
   发行版以及一些不提供包管理器的发行版提供通用的指令。
@@ -50,6 +51,8 @@ see the [Creating a cluster with kubeadm](/docs/setup/production-environment/too
 * 节点之中不可以有重复的主机名、MAC 地址或 product_uuid。请参见[这里](#verify-mac-address)了解更多详细信息。
 * 开启机器上的某些端口。请参见[这里](#check-required-ports)了解更多详细信息。
 * 禁用交换分区。为了保证 kubelet 正常工作，你**必须**禁用交换分区。
+  * 例如，`sudo swapoff -a` 将暂时禁用交换分区。要使此更改在重启后保持不变，请确保在如
+    `/etc/fstab`、`systemd.swap` 等配置文件中禁用交换分区，具体取决于你的系统如何配置。
 
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