error: insufficient permissions for device

在ubuntu上进行android开发是，将设备连接到电脑上，执行adb shell命令，会报出如下错误：

error: insufficient permissions for device

解决的办法：

root@android-ubuntu:platform-tools#  adb kill-server

root@android-ubuntu:platform-tools#  adb start-server

* daemon not running. starting it now on port 5037 *

* daemon started successfully *

root@android-ubuntu:platform-tools#  exit

然后在命令行下执行adb shell就可以了。