diff --git a/Software/OperatingSystem/Linux/Ubuntu/ubuntu_usb_连接手机无法识别设备解决方法.md b/Software/OperatingSystem/Linux/Ubuntu/ubuntu_usb_连接手机无法识别设备解决方法.md
index 4bba2f3..e94870a 100644
--- a/Software/OperatingSystem/Linux/Ubuntu/ubuntu_usb_连接手机无法识别设备解决方法.md
+++ b/Software/OperatingSystem/Linux/Ubuntu/ubuntu_usb_连接手机无法识别设备解决方法.md
@@ -2,32 +2,32 @@
 
 1. usb线连接手机，输入命令  
 
-	$ lsusb
-	Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
-	Bus 001 Device 003: ID 0461:4e22 Primax Electronics, Ltd 
-	Bus 001 Device 002: ID 413c:2107 Dell Computer Corp. 
-	Bus 001 Device 029: ID 2c73:7029  
-	Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
+    $ lsusb
+    Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
+    Bus 001 Device 003: ID 0461:4e22 Primax Electronics, Ltd
+    Bus 001 Device 002: ID 413c:2107 Dell Computer Corp.
+    Bus 001 Device 029: ID 2c73:7029
+    Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 
 2. 输入命令  
 
-	$ sudo gedit ~/.android/adb_usb.ini
+    $ sudo gedit ~/.android/adb_usb.ini
 
 打开编辑器，加入设备 id  
 
-	0x2c73
+    0x2c73
 
 3. 输入命令  
 
-	$ chmod 777 ~/.android/adb_usb.ini
+    $ chmod 777 ~/.android/adb_usb.ini
 
 4. 输入  
 
-	$ adb kill-server
+    $ adb kill-server
 
 再次  
 
-	$ adb devices
+    $ adb devices
 
 可发现已连接上设备。