diff --git a/anolis-courses/git-101/committing-changes/start.md b/anolis-courses/git-101/committing-changes/start.md
index 79ad2ddea407d59761a37975c367130ce817ccd6..f811482f32390d8545d72c02308ce61c0771a744 100644
--- a/anolis-courses/git-101/committing-changes/start.md
+++ b/anolis-courses/git-101/committing-changes/start.md
@@ -4,4 +4,5 @@ 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
 
 锄禾日当午
 
+
 ![](assets/cover.png)
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diff --git a/anolis-courses/make-and-packaging/dev-under-linux/start.md b/anolis-courses/make-and-packaging/dev-under-linux/start.md
index 50cde333c71de0ef1ed94b67b751fe95dae3fcf7..0d258013aeda740f45b4492c9bc79bc024b709a9 100644
--- a/anolis-courses/make-and-packaging/dev-under-linux/start.md
+++ b/anolis-courses/make-and-packaging/dev-under-linux/start.md
@@ -1 +1 @@
-通过本章内容，你将学习到Linux的基本操作以及在Linux环境下进行软件开发工作的基本能力。
\ No newline at end of file
+通过本章内容，你将学习到Linux的基本操作以及在Linux环境下进行软件开发工作的基本能力。
diff --git a/anolis-courses/playground/playground/start.md b/anolis-courses/playground/playground/start.md
index 9e775f637e93ef6b8f3d0c2eecc146df3b88cba6..6410dfa5fdb147118305359bc48118fa35881a4b 100644
--- a/anolis-courses/playground/playground/start.md
+++ b/anolis-courses/playground/playground/start.md
@@ -2,3 +2,4 @@
 
 锄禾日当午
 
+