diff --git a/Software/Applications/I2C/Linux_下_I2C_工具.md b/Software/Applications/I2C/Linux_下_I2C_工具.md
index b5c58d3..6c95e34 100644
--- a/Software/Applications/I2C/Linux_下_I2C_工具.md
+++ b/Software/Applications/I2C/Linux_下_I2C_工具.md
@@ -1,5 +1,14 @@
 # Linux 下 I2C 工具
 
+## 1.I2C 工具的安装
+
+```bas
+# Ubuntu
+apt-get install libi2c-dev i2c-tools
+```
+
+## 2.基本使用方法
+
 ```bash
 # 检测 I2C 设备
 i2cdetect -y -r <bus num>
@@ -11,7 +20,7 @@ i2cget -f -y <bus num> <dev addr> [reg addr[b/w/c]]
 i2cdump -f -y <bus num> <dev addr> [b/w/W/s/i/c]
 ```
 
-## 1.i2cdetect
+## 3.i2cdetect
 
 **Synopsis:**