开机免登陆设置实现

1.Change the symbolic link to point to the busybox's getty:

           <board-shell># rm /sbin/getty

          <board-shell># ln -s /bin/busybox /sbin/getty

2.In board's /etc/inittab change the getty line to:

          S:2345:respawn:/sbin/getty 115200 ttyO2 -n -l /bin/autologin

3. Create executable /bin/autologin script with the following content:

          #!/bin/sh
          exec /bin/login -f root

and  reboot