diff --git a/other.md b/other.md
index 39216b3..b428010 100644
--- a/other.md
+++ b/other.md
@@ -177,13 +177,7 @@ wall #向所有在线的用户发送消息，输入信息之后按 `control +d`
 #### sort 命令
 
 ```
-
+ls /usr | sort #排序
 ```
 
 
-#### join 命令
-
-```
-
-```
-