了解更多：http://hi.baidu.com/iceliushuai/item/74635bc93ef4520fad092f12
shily@hh-desktop:~$ sudo -s
[sudo] password for shily:
root@hh-desktop:~# adb kill-server ； adb start-server
* daemon not running. starting it now *
* daemon started successfully *
root@hh-desktop:~# exit
exit
shily@hh-desktop:~$
再次执行adb shell就可以了。
