1242035

Error:

$ adb devices
List of devices attached
52003c2b58b445db	no permissions (user in plugdev group; are your udev rules wrong?); see [http://developer.android.com/tools/device.html]

Fix: 
1> sudo usermod -aG plugdev $LOGNAME (https://developer.android.com/studio/run/device)
2> lsusb
3> sudo vi /etc/udev/rules.d/51-android.rules