Here's how you can enable auto-login on your Ubuntu system. 1. Open the System Settings application. 2. Go to User Accounts. 3. Click the Unlock button and type in your password. 4. Click on the user you want to use auto-login. 5. Toggle the auto-login slider to the On setting. 6. Click Lock to save your changes.
For more, see the original article at the link below.
How Can I Auto-login in Ubuntu 12.04? | OMG Ubuntu