diff --git a/README.md b/README.md
index 89cf851..bb3caf9 100644
--- a/README.md
+++ b/README.md
@@ -10,20 +10,23 @@
 
 ```bash
 su -
+```
+
+输入密码后回车再输入
+
+```bash
 apt update && apt install curl wget sudo
 ```
 
 安装完后请使用以下命令换源：
 
 ```bash
-su -
 bash <(curl -s http://10.16.80.222:3000/Weishen/Hydro-Setup/raw/branch/main/apt-mirror.sh)
 ```
 
 #### 3. 为 ptyz 用户增加 sudo 权限
 
 ```bash
-su -
 usermod -aG sudo ptyz # 加入 sudoer 组
 echo 'ptyz ALL=(ALL:ALL) NOPASSWD: ALL' > /etc/sudoers.d/ptyz && chmod 0440 /etc/sudoers.d/ptyz # 免密 sudo
 ```
@@ -31,14 +34,14 @@ echo 'ptyz ALL=(ALL:ALL) NOPASSWD: ALL' > /etc/sudoers.d/ptyz && chmod 0440 /etc
 #### 4. 安装 Hydro OJ
 
 ```bash
-su -
+sudo su
 LANG=zh . <(curl http://10.16.80.222:3000/Weishen/Hydro-Setup/raw/branch/main/setup.sh) &&  pm2 unstartup && pm2 startup -u root
 ```
 
 #### 5. 安装 GCC 9.3.0 以支持 NOI 标准
 
 ``bash
-su -
+sudo su
 bash <(curl -s http://10.16.80.222:3000/Weishen/Hydro-Setup/raw/branch/main/gcc9.3.0.sh)
 ```