Ctrl+g - show the current file status information
:ls - show current buffers, + in status says that changes has been made to a buffer, a - shows that this is active buffer
:number - show line number in status
:set number - show line numbers
:set list - see the formating codes in vim
:syntax on - turn syntax highlighting on
:syntax off - turn syntax highlighting off
:vsp /etc/resolv.conf - vertical split
:sp /etc/resolv.conf - horisontal split
Ctrl+w r - rotate them
Ctrl+w w - change window