Cygwin下安装vim后,vim中退格键无法正常使用的解决方法

admin@ThinkPad ~
$ cp /usr/share/vim/vim74/vimrc_example.vim ~/.vimrc
admin@ThinkPad ~
$ cat ~/.vimrc
" An example for a vimrc file.
"
" Maintainer:  Bram Moolenaar <Bram@vim.org>
" Last change: 2011 Apr 15
"
" To use it, copy it to
"   for Unix and OS/2: ~/.vimrc
"       for Amiga: s:.vimrc
" for MS-DOS and Win32: $VIM\_vimrc
"      for OpenVMS: sys$login:.vimrc

" When started as "evim", evim.vim will already have done these settings.
if v:progname =~? "evim"
 finish
endif

" Use Vim settings, rather than Vi settings (much better!).
" This must be first, because it changes other options as a side effect.
set nocompatible

" allow backspacing over everything in insert mode
set backspace=indent,eol,start
......