To autologin to Ubuntu Server you will need to get mingetty
sudo apt-get intall mingetty
Then you will want to edit /etc/event.d/tty1 and change the following: exec /sbin/getty 38400 tty1 to exec /sbin/mingetty –autologin your_username tty1
To autologin to Ubuntu Desktop do the following
sudo gdmsetup
click on the Security tab
check Enable Automatic Login
Select the username from the drop down [...]