diff --git a/content/post/nginx.md b/content/post/nginx.md
index 3586b7d..9e49931 100644
--- a/content/post/nginx.md
+++ b/content/post/nginx.md
@@ -72,9 +72,20 @@ categories: ["web"]
 - / 通用匹配，可匹配任何请求，匹配后继续向下搜索
 
 ## try_files
-- try_files {file} ... {uri}
-- try_files {file} ... ={code}
-- try_files {file} ... {location_name}
+- 未找到这四个文件时，跳转到 url：/a/b/c
+    ```
+    try_files file1 file2 file3 file4 /a/b/c;
+    ```
+
+- 未找到文件或目录时返回 403
+    ```
+    try_files file1 dir2/ =403;
+    ```
+
+- 直接跳转到 location @app
+    ```
+    try_files _ @app;
+    ```
 
 ## 客户端访问控制
 - deny all 拒绝全部访问