diff --git a/README.md b/README.md
index c1d8ac1cc4b4f9538d6ad59159b52e4d52b39837..bc165fdd5979016e1fb248dee5fb18a2b2c3d971 100644
--- a/README.md
+++ b/README.md
@@ -100,3 +100,7 @@ We use the same license as the upstream does, so please refer to the [COPYING](C
 + Join the [mailing list discussions](MAILLIST.md);
 + Join the [forum discussions](https://bbs.aliyun.com/thread/450.html);
 + Send us an E-mail to [alicloud-linux-os@service.alibaba.com](mailto:alicloud-linux-os@service.alibaba.com) is always a good idea.
+
+--------------------------------
+
+> The registered trademark Linux® is used pursuant to a sublicense from the Linux Foundation, the exclusive licensee of Linus Torvalds, owner of the mark on a world­wide basis.
diff --git a/os.md b/os.md
index 7c8f7d34aa4d3b4a51293a1c197d982edaa84921..8feb44c73c1f78ea08a382c69596490bd2fd84e1 100644
--- a/os.md
+++ b/os.md
@@ -46,3 +46,7 @@ To get helps when using Alibaba Cloud Linux OS, you can
 + Join the [mailing list discussions](MAILLIST.md);
 + Join the [forum discussions](https://bbs.aliyun.com/thread/450.html);
 + Send us an E-mail to [alicloud-linux-os@service.alibaba.com](mailto:alicloud-linux-os@service.alibaba.com).
+
+------------------------
+
+> The registered trademark Linux® is used pursuant to a sublicense from the Linux Foundation, the exclusive licensee of Linus Torvalds, owner of the mark on a world­wide basis.
diff --git a/zh/README.md b/zh/README.md
index 2de93f4c53d48b5069980ad7dee1a903927e7409..5bca8cb07ce0cb4d66016185e1440f097796fc5b 100644
--- a/zh/README.md
+++ b/zh/README.md
@@ -103,3 +103,7 @@ ALK 和 Alibaba Cloud Linux OS 项目是“站在巨人的肩膀上”且聚合
 + 加入[邮件列表](MAILLIST.md)参与讨论；
 + 加入[开发者论坛](https://bbs.aliyun.com/thread/450.html)参与讨论；
 + 或者可以给我们发邮件：[alicloud-linux-os@service.alibaba.com](mailto:alicloud-linux-os@service.alibaba.com).
+
+--------------------------------
+
+> The registered trademark Linux® is used pursuant to a sublicense from the Linux Foundation, the exclusive licensee of Linus Torvalds, owner of the mark on a world­wide basis.
diff --git a/zh/os.md b/zh/os.md
index ba1f812bc6cf11f5bef68305a0aedab0ea10b0e3..8402efa21b3485c4c9cf64e98e1fd48b8c694531 100644
--- a/zh/os.md
+++ b/zh/os.md
@@ -47,3 +47,7 @@ sudo yumdownloader --source <包名>
 + 可以加入[开发者论坛](https://bbs.aliyun.com/thread/450.html)参与讨论；
 + 可以加入钉钉群：`Alibaba Cloud Linux OS 开发者&用户群`，群号：`23149462`;
 + 或者可以给我们发邮件：[alicloud-linux-os@service.alibaba.com](mailto:alicloud-linux-os@service.alibaba.com).
+
+--------------------------------
+
+> The registered trademark Linux® is used pursuant to a sublicense from the Linux Foundation, the exclusive licensee of Linus Torvalds, owner of the mark on a world­wide basis.