diff --git a/.gitignore b/.gitignore
index 5a4de2d..68dd04c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 /install
 **/build
 /log
-/.vscode
\ No newline at end of file
+/.vscode
+/.cache
\ No newline at end of file
diff --git a/README.md b/README.md
index 9a37321..3383235 100644
--- a/README.md
+++ b/README.md
@@ -66,7 +66,7 @@
 如果出现了图标与字体显示错误的问题，请在项目根目录下执行以下命令:
 
 ```bash
-cp -r ./visualization_tool/Ela_depend/Font  /usr/share/fonts/truetype
+sudo cp -r ./visualization_tool/Ela_depend/Font  /usr/share/fonts/truetype
 ```
 
 或打开项目根目录下的```visualization_tool/Ela_depend/Font```文件夹，安装其字体