diff --git a/docs/en/get-started/linux-setup.rst b/docs/en/get-started/linux-setup.rst
index 69efe04918..b16870745f 100644
--- a/docs/en/get-started/linux-setup.rst
+++ b/docs/en/get-started/linux-setup.rst
@@ -35,7 +35,7 @@ With some Linux distributions you may get the ``Failed to open port /dev/ttyUSB0
 Setting up Python 3 as default for Ubuntu and Debian
 ----------------------------------------------------
 
-Ubuntu and Debian are still providing Python 2.7 as the default interpreter but some required packages may be missing for newer distributions. Python 3 is recommended and can be installed as follows::
+Ubuntu (distributions before v20.04) and Debian (distributions before v7) are still providing Python 2.7 as the default interpreter. Python 3 is recommended instead and can be installed in old distributions as follows, or please consult the documentation of your operating system for other recommended ways to achieve this::
 
     sudo apt-get install python3 python3-pip python3-setuptools
 
diff --git a/docs/zh_CN/get-started/linux-setup.rst b/docs/zh_CN/get-started/linux-setup.rst
index 38b04a8552..56b3b665ea 100644
--- a/docs/zh_CN/get-started/linux-setup.rst
+++ b/docs/zh_CN/get-started/linux-setup.rst
@@ -32,6 +32,20 @@ Linux 平台工具链的标准设置
 
 使用某些 Linux 版本向 {IDF_TARGET_NAME} 烧写固件时，可能会出现 ``Failed to open port /dev/ttyUSB0`` 错误消息。此时，可以将当前用户增加至 :ref:` Linux Dialout 组 <linux-dialout-group>`。
 
+设置 Python 3 为 Ubuntu 和 Debian 默认 Python 版本
+----------------------------------------------------
+
+Ubuntu v20.04 和 Debian v7 之前的版本默认解释器为 Python 2.7，但这里推荐使用 Python 3，您可以运行下方命令安装 Python 3。或者查看当前所用系统的相关文档，按照文档推荐的其它方法安装 Python 3::
+
+    sudo apt-get install python3 python3-pip python3-setuptools
+
+设置 Python 3 为默认 Python 版本::
+
+    sudo update-alternatives --install /usr/bin/python python /usr/bin/python3 10
+
+.. note::
+    上述设置为全局设置，同时会影响到其它应用。
+
 后续步骤
 ==========