title: using command "adb shell install" and showing "install: not found"
body: <p>I'm using command <code>adb shell install xxx.apk</code> to install an APK on the emulator, however, it shows </p>
  
  <blockquote>
    <p>/system/bin/sh: install: not found
    I have done this for many times and today it suddenly fails.</p>
  </blockquote>
  
  <p>I have read some similar questions on StackOverflow but they can't solve my questions. I have set my SDK path and I just start one avd.</p>