android studio doesn't detect my device on my ubuntu laptop

Question

I am trying to run an app from Android Studio on my Ubuntu laptop.

I have enabled USB debugging, but it is still not working.

When I press run

Answer 1

My device appeared as unrecognized and when I ran adb devices fom android-tools directory it said: adb not a command. Strange. So what I did is installed adb tools additionally and then run adb devices:

sudo apt-get install android-tools-adb

89LY0810Y unauthorized

Then I saw the dialog on my device and selected: Always authorize.

Please make sure your device is in debug mode.