现象：

已经在～/.vimrc中增加了下面一行：

au BufReadPost * if line("'\"") > 0|if line("'\"") <= line("$")|exe("norm '\"")|else|exe "norm $"|endif|endif

但是只有用sudo vim的时候才会记住上次编辑的位置，直接vim总是从第一行开始。

原因：

[yuanlulu@ubuntu: ~]$ll ./.viminfo 

-rw------- 1 root root 4558 2011-12-09 13:58 ./.viminfo

原来记录位置的文件仅仅对root开放了读写权限。

解决办法：

对非root用户增加对~/.viminfo的读写权限

sudo chmod a+w ./.viminfo 

sudo chmod a+R ./.viminfo

附上自己的vim配置文件

--------------------------------------------------------------------------

" All system-wide defaults are set in $VIMRUNTIME/debian.vim (usually just
" /usr/share/vim/vimcurrent/debian.vim) and sourced by the call to :runtime
" you can find below.  If you wish to change any of those settings, you should
" do it in this file (/etc/vim/vimrc), since debian.vim will be overwritten
" everytime an upgrade of the vim packages is performed.  It is recommended to
" make changes after sourcing debian.vim since it alters the value of the
" 'compatible' option.


" This line should not be removed as it ensures that various options are
" properly set to work with the Vim-related packages available in Debian.
runtime! debian.vim


" Uncomment the next line to make Vim more Vi-compatible
" NOTE: debian.vim sets 'nocompatible'.  Setting 'compatible' changes numerous
" options, so any other options should be set AFTER setting 'compatible'.
"set compatible
set nocompatible


" Vim5 and later versions support syntax highlighting. Uncommenting the next
" line enables syntax highlighting by default.
if has("syntax")
  syntax on
endif


" If using a dark background within the editing area and syntax highlighting
" turn on this option as well
"set background=dark


" Uncomment the following to have Vim jump to the last position when
" reopening a file
"if has("autocmd")
"  au BufReadPost * if line("'\"") > 1 && line("'\"") <= line("$") | exe "normal! g'\"" | endif
"endif


" Uncomment the following to have Vim load indentation rules and plugins
" according to the detected filetype.
"if has("autocmd")
"  filetype plugin indent on
"endif


" The following are commented out as they cause vim to behave a lot
" differently from regular Vi. They are highly recommended though.
set showcmd " Show (partial) command in status line.
set showmatch " Show matching brackets.
set ignorecase " Do case insensitive matching
set smartcase " Do smart case matching
set incsearch " Incremental search
"set autowrite " Automatically save before commands like :next and :make
"set hidden             " Hide buffers when they are abandoned
set mouse=a " Enable mouse usage (all modes)


" Source a global configuration file if available
if filereadable("/etc/vim/vimrc.local")
  source /etc/vim/vimrc.local
endif


set number
set ai
set smartindent
set cindent
set tabstop=4
set softtabstop=4
set shiftwidth=4


"突出横向和纵向的光标
set cursorline
"highlight CursorLine guibg=lightblue ctermbg=lightgray
"set cursorcolumn


filetype on


"记住上次编辑的位置
au BufReadPost * if line("'\"") > 0|if line("'\"") <= line("$")|exe("norm '\"")|else|exe "norm $"|endif|endif
"autocmd BufReadPost * 
" \ if line("'\"") > 0 && line("'\"") <= line("$") |
" \ exe "normal g`\"" |
" \ endif


"高亮显示搜索匹配项
set hlsearch
set incsearch


"显示括号配对情况
 set magic 


"显示状态栏
"set statusline=%F%m%r%h%w/ [FORMAT=%{&ff}]/ [TYPE=%Y]/ [ASCII=/%03.3b]/ [HEX=/%02.2B]/ [POS=%04l,%04v][%p%%]/ [LEN=%L]
"set statusline=%F%m%r%h%w/ [FORMAT=%{&ff}]/ [TYPE=%Y]/ [ASCII=/%03.3b]/ [HEX=/%02.2B]/ [POS=%04l,%04v][%p%%]/ [LEN=%L]
set laststatus=2


"---------------------------------------------------------------------------------"


let g:statusline_max_path = 20
fun! StatusLineGetPath() "{{{
  let p = expand('%:.:h') "relative to current path, and head path only
  let p = substitute(p,'\','/','g')
  let p = substitute(p, '^\V' . $HOME, '~', '')
  if len(p) > g:statusline_max_path 
    let p = simplify(p)
    let p = pathshorten(p)
  endif
  return p
endfunction "}}}


nmap <Plug>view:switch_status_path_length :let g:statusline_max_path = 200 - g:statusline_max_path<cr>
nmap ,t <Plug>view:switch_status_path_length






set laststatus=2


augroup Statusline
  au! Statusline


  au BufEnter * call <SID>SetFullStatusline()
  au BufLeave,BufNew,BufRead,BufNewFile * call <SID>SetSimpleStatusline()
augroup END


fun! StatusLineRealSyn()
    let synId = synID(line('.'),col('.'),1)
    let realSynId = synIDtrans(synId)
    if synId == realSynId
        return 'Normal'
    else
        return synIDattr( realSynId, 'name' )
    endif
endfunction


fun! s:SetFullStatusline() "{{{
  setlocal statusline=
  setlocal statusline+=%#StatuslineBufNr#%-1.2n\                   " buffer number
  setlocal statusline+=%h%#StatuslineFlag#%m%r%w                 " flags
  setlocal statusline+=%#StatuslinePath#\ %-0.20{StatusLineGetPath()}%0* " path
  setlocal statusline+=%#StatuslineFileName#\/%t\                       " file name


  setlocal statusline+=%#StatuslineFileEnc#\ %{&fileencoding}\         " file encoding
  setlocal statusline+=%#StatuslineFileType#\ %{strlen(&ft)?&ft:'**'}\ . " filetype
  setlocal statusline+=%#StatuslineFileType#%{&fileformat}\             " file format
  setlocal statusline+=%#StatuslineTermEnc#\ %{&termencoding}\           " encoding
  setlocal statusline+=%#StatuslineChar#\ %-2B\ %0*                 " current char
  setlocal statusline+=%#StatuslineSyn#\ %{synIDattr(synID(line('.'),col('.'),1),'name')}\ %0*           "syntax name
  setlocal statusline+=%#StatuslineRealSyn#\ %{StatusLineRealSyn()}\ %0*           "real syntax name
  setlocal statusline+=%=


  setlocal statusline+=\ %-10.(%l,%c-%v%)             "position
  setlocal statusline+=%P                             "position percentage
  setlocal statusline+=\ %#StatuslineTime#%{strftime(\"%m-%d\ %H:%M\")} " current time


endfunction "}}}


fun! s:SetSimpleStatusline() "{{{
  setlocal statusline=
  setlocal statusline+=%#StatuslineNC#%-0.20{StatusLineGetPath()}%0* " path
  setlocal statusline+=\/%t\              E`Q