How to Restart Android ADB(Android Debug Bridge) ?

Method 1:

To restart ADB(Android Debug Bridge) by command line:

adb kill-server
adb start-server

Method 2:

To restart ADB(Android Debug Bridge) in Eclipse:

1. Window > Show View > Other... > Android/Devices
2. When the view is showing: View Menu of "Devices" > Reset ADB

Refer below Screen

How to Enable USB Debugging in Android 4.3 and above versions ?

Steps for Enabling USB debug mode in android version 4.3 and above......

Step 1: Go to Settings.

Step 2: Click About.

Step 3: Open Software information.

Step 4: Tap Build number continuously until a pop-up hint informs you that you have entered the developer mode.

Step 5: Return to Settings.

Step 6: Find and open Developer options.

Step 7: Select USB debugging and click OK.

After these seven steps, the USB debugging is enabled successfully.