diff --git a/tool.md b/tool.md
index 51ba919..131dc85 100644
--- a/tool.md
+++ b/tool.md
@@ -21,4 +21,6 @@
 
 - __`sqlmap` 数据库扫描工具__
 
-- __`ssh-copy-id`__ 公私钥快捷上传工具
\ No newline at end of file
+- __`ssh-copy-id` 公私钥快捷上传工具__ 
+
+- __`tldr` 命令简化说明__ 
\ No newline at end of file