如何自动登录tty并执行脚本

I have installed android x86 on my desktop.When i select the boot option of android in the grub,it goes to tty8 and then I go to tty1 using alt+F1,and then login into my Ubuntu user account (where my android images are stored)run a start-up shell script which loads android. What i need is to automate these processes i.e. when i select the boot option of android,it should go to tty1 and execute the shell script automatically without having to log in.I have installed android x86 on my desktop.When