Screen

1. New a windown in vertical
{{
screen
# new a screen in bottom
contral + a
shift +s
# Move to below
controal + tab
# new a scrren
contral + a -> c

}}}


Reference:
http://go-linux.blogspot.com/search?q=screen
http://magazine.redhat.com/2007/09/27/a-guide-to-gnu-screen/