set number
 set nobackup
 set tabstop=4
 set cursorline
 highlight CursorLine   cterm=NONE ctermbg=black ctermfg=NONE guibg=NONE guifg=NONE                                                                      
 set smartindent
 set fileencodings=utf-8,ucs-bom,gb18030,gbk,gb2312,cp936
 set termencoding=utf-8
 set encoding=utf-8
 set hlsearch
 set shiftwidth=4