◎ Foreword I am a Pico user, when I was Redhat Linux users, I felt that Pico felt very kind and function was very powerful. After FreeBSD, suddenly found that there is no Pico, you need to install Pine only Can be achieved. But this is nothing, anyway is installed very quickly ... until one day, when I want to replace the action .. At this time .... Pico ... so I diverted VI ... Go to understand His rule representation, a simple little action makes the cumbersome work instantly. Not only this .. VI is an editor for all UNIX-LIKE ... No additional installation allows you to enter different systems Status. ◎ Fast Startup If you have never used the full screen editor, you may have a problem with some simple editing. So you might want to find someone who has already learned VI to lead you. VI is a screen The editor, which indicates that VI is almost used by each line of space on the screen to display the contents of the file. In addition to the last line on the screen. This line is used to give you the order command to you some related file information. Time to use. You must understand that VI is a schema editor. For example: You can enter text or execute the command, but you must be able to execute in the correct mode. You first edited a file You are in command mode. There are some commands that allow you to switch to input mode. However, only one key will allow you to leave the input mode, that is, the