title: How to run adb push as root?
body: <p>I want to use <code>adb pull</code> to pull a db file from Nexus 7 to PC.</p>
  
  <p>My nexus 7 has been rooted. </p>
  
  <p>If a use "<code>adb pull /data/data/com.xx.xx/databases/xx.db</code> .",
   it failed because of permission problem. But if I use <code>"&gt;adb shell; &gt;su"</code>, but then I can't use <code>"adb pull"</code> command. </p>