Vim usage

配置：
在Ubuntu11.10默认是vim.tiny，不能语法高亮，所以安装vim:
sudo apt-get install vim            

配置自动缩进，在vim下:version查看vimrc的位置，vimrc文件中添加
set autoindent   

Normal mode:

3x     # to delete three character
Ctrl+r # and u to undo
ZZ     # write and exit vim

Ex mode:

:!bash # enter bash shell, exit to back to vi
:20    # jump to 20 line
:set all # list all settings
:set     # list the settings different from default
:set ai  # set autoindent

http://www.viemu.com/a_vi_vim_graphical_cheat_sheet_tutorial.html