title: Adb install apk failure
body: <p>my problem is about android and the adb commands. I'm working on a Nexus 5 and i want to install and apk with adb commands. So i start with adb devices, my mobile is detected by the computer so i go to the repertory where the apk is located and i launch <code>adb install name.apk
  </code>
  It returns :<code>
  * daemon not running. starting it now on port 5038 *
  * daemon started successfully *
  error: device not found
  - waiting for device -</code></p>
  
  <p>The Nexus 5 is rooted, and usb debug is activated</p>
  
  <p><code>adb devices</code> give me some sort of serial number of the mobile</p>