diff --git a/anolis-courses/git-101/committing-changes/start.md b/anolis-courses/git-101/committing-changes/start.md
index f811482f32390d8545d72c02308ce61c0771a744..1e168bf3b71bc5b59140dde0313e6a1c427481dc 100644
--- a/anolis-courses/git-101/committing-changes/start.md
+++ b/anolis-courses/git-101/committing-changes/start.md
@@ -5,4 +5,5 @@ 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
 
 
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 ![](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 0d258013aeda740f45b4492c9bc79bc024b709a9..c9b48b5fdd10739190b34cee2117cbc025ae442c 100644
--- a/anolis-courses/make-and-packaging/dev-under-linux/start.md
+++ b/anolis-courses/make-and-packaging/dev-under-linux/start.md
@@ -1 +1,2 @@
 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 6410dfa5fdb147118305359bc48118fa35881a4b..e74e3c445904ca08af8b0e7007468e46d4d5ab82 100644
--- a/anolis-courses/playground/playground/start.md
+++ b/anolis-courses/playground/playground/start.md
@@ -3,3 +3,4 @@
 锄禾日当午
 
 
+