diff --git a/anolis-courses/git-101/committing-changes/start.md b/anolis-courses/git-101/committing-changes/start.md
index a6e1f83844b15740858235fbe66d0b5358fda211..79ad2ddea407d59761a37975c367130ce817ccd6 100644
--- a/anolis-courses/git-101/committing-changes/start.md
+++ b/anolis-courses/git-101/committing-changes/start.md
@@ -2,4 +2,6 @@
 Git 是一个开源的分布式版本控制系统，用于敏捷高效地处理任何或小或大的项目,是 Linus Torvalds 为了帮助管理 Linux 内核开发而开发的一个开放源码的版本控制软件。
 通过本系列课程的学习，你将掌握如何使用Git来管理你的代码仓库。  
 
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 ![](assets/cover.png)
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diff --git a/anolis-courses/make-and-packaging/install-packages/start.md b/anolis-courses/make-and-packaging/install-packages/start.md
index fd51b45070ee09dcae5544b196a9e1c087c6328b..833f6ee92ae24f3e4bf329e71d70539449d98ced 100644
--- a/anolis-courses/make-and-packaging/install-packages/start.md
+++ b/anolis-courses/make-and-packaging/install-packages/start.md
@@ -1 +1,3 @@
-通过本章内容，你将学习到如何在Linux环境下安装新的软件。
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+通过本章内容，你将学习到如何在Linux环境下安装新的软件。
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diff --git a/anolis-courses/playground/playground/start.md b/anolis-courses/playground/playground/start.md
index c2019fcbc4836a5cb7359af927f917c107a2de67..d46b39d212767c7decc5756f4fd571af4899bc7a 100644
--- a/anolis-courses/playground/playground/start.md
+++ b/anolis-courses/playground/playground/start.md
@@ -1 +1,3 @@
 在浏览器中体验openEuler真实环境！
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