A 14 lines only .vimrc files for the vim under linux, I can use it everywhere as I used to be.

set nocompatible " get out of horrible vi-compatible mode
syntax on " syntax highlight on
set ruler " Always show current positions along the bottom
set number " trun on line number
set showmatch " show matching brackets
set ai " autoindent
set si " smartindent
set cindent " do c-style indenting
set tabstop=4 " tab spacing
set softtabstop=4 " tab spacing
set shiftwidth=4 " tab spacing
set expandtab " not real tabs please!
set smarttab " use tabs at the start of a line, spaces elsewhere
set so=5 " Keep 5 lines (top/bottom) for scope