To add Colors, line numbers, and restore the cursors last position in the VI editor, you place the following into a .vimrc file in your $HOME directory.

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if &t_Co > 2 || has("gui_running")
  syntax on
  set hlsearch
  set number
end
" Tell vim to remember certain things when we exit
"  '10 : marks will be remembered for up to 10 previously edited files
"  "100 : will save up to 100 lines for each register
"  :20 : up to 20 lines of command-line history will be remembered
"  % : saves and restores the buffer list
"  n... : where to save the viminfo files
set viminfo='10,\"100,:20,%,n~/.viminfo

" when we reload, tell vim to restore the cursor to the saved position
augroup JumpCursorOnEdit
 au!
 autocmd BufReadPost *
 \ if expand("<afile>:p:h") !=? $TEMP |
 \ if line("'\"") > 1 && line("'\"") <= line("$") |
 \ let JumpCursorOnEdit_foo = line("'\"") |
 \ let b:doopenfold = 1 |
 \ if (foldlevel(JumpCursorOnEdit_foo) > foldlevel(JumpCursorOnEdit_foo - 1)) |
 \ let JumpCursorOnEdit_foo = JumpCursorOnEdit_foo - 1 |
 \ let b:doopenfold = 2 |
 \ endif |
 \ exe JumpCursorOnEdit_foo |
 \ endif |
 \ endif
 " Need to postpone using "zv" until after reading the modelines.
 autocmd BufWinEnter *
 \ if exists("b:doopenfold") |
 \ exe "normal zv" |
 \ if(b:doopenfold > 1) |
 \ exe "+".1 |
 \ endif |
 \ unlet b:doopenfold |
 \ endif
augroup END
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