Ubuntu the root login and vi arrow keys Backspace key amendments

Ubuntu early use will do two things

The first time you use Ubuntu, first thing to do is to modify the root access and set as the default login account, correcting the vi editor of the left and right and up and down the backspace key (or the default output ABCD).

Permission to take root and the default login

Open a terminal. button:

ctrl+alt+T 

Set the root password. Input:

sudo passwd root 

Need to enter the old password - Enter the root password - Confirm root password. When the input does not show press Enter after digital input can be completed.
Enter root privileges. Input:

su

But this time has not changed the default login user.
Set the following logon rights to modify the document. Input:

gedit /usr/share/lightdm/lightdm.conf.d/50-ubuntu.conf

This is 14.0 or later path.
After entering add two lines of code:

autologin-user=root
greeter-show-manual-login=true

Last Modified /root/.profile precede mesg n || true tty -s &&

tty -s && mesg n || true

Restart

reboot

vi command correction

method one

Uninstall the old version and install the new one.

apt-get remove vim-common
apt-get install vim

Method Two

Edit /etc/vim/vimrc.tiny

gedit /etc/vim/vimrc.tiny

The set compatible and his party to set nocompatible set backspace = 2

set nocompatible
set backspace=2