) Literacy action 9: basic usage of the Vi Editor !, Literacy vi

(Transfer) Action 9: basic usage of the Vi Editor !, Literacy vi

The vi editor is a standard editor for all Unix and Linux systems. It is not inferior to any of the latest text editors. Here we just briefly introduce its usage and a few instructions. The vi editor is identical for any version of Unix and Linux systems, so you can learn more about it in any other section about vi. Vi is also the most basic text editor in Linux. After learning it, you will be able to enjoy the free access in the Linux World.

 

1. Basic concepts of vi 
Basically, vi can be divided into three states: command mode, Insert mode, and last line mode. The functions of each mode are as follows:

1) command mode)

Controls the movement of the screen cursor, the deletion of characters, words, or rows, the movement of copying a segment and entering the Insert mode, or to the last line mode.

2) Insert mode)

You can enter text only in Insert mode. Press ESC to return to command line mode.

3) Baseline mode)

Save the file or exit vi. You can also set the editing environment, such as searching strings and listing row numbers ...... .

However, we generally simplify vi into two modes in use, that is, the last line mode is also included in the command line mode ).

 

2. Basic operations of vi
A) Go to vi

After the system prompts you to enter the vi and file name, you will be taken to the vi full screen editing screen:

$ Vi myfile


Note that after entering vi, you are in command mode. You must switch to Insert mode to Enter text. People who use vi for the first time will want to move the cursor first with the upper and lower right keys. As a result, the computer keeps beeping and getting angry with themselves. So after entering vi, do not tamper with the mouse, switch to "Insert mode!

B) switch to Insert mode to edit the file

Click "I" under "command mode" to enter "Insert mode". Then, you can enter the text.

C) Insert switchover

You are currently in "Insert mode", and you can only enter text all the time. If you find that you have entered an error! To move the word back with the light mark key, you must first Press ESC to switch to command mode and then delete the text.

D) Exit vi and save the file

Under "command mode", click ":" colon to enter "Last line mode". For example:

: W filename (enter "w filename" to save the article with the specified filename)

: Wq (enter "wq" to save the disk and exit vi)

: Q! (Enter q !, Force exit vi without saving the disk)

 

3. command mode function key
1). insert mode

Press "I" to switch to the insert mode "insert mode". Press "I" to enter the insert mode. The input file starts from the current position of the cursor;

After you press "a" to enter the insert mode, the text is entered starting from the next position where the cursor is currently located;

After you press "o" to enter the insert mode, a new row is inserted and text is entered from the beginning of the line.

2) switch from insert mode to Command Line Mode

Press ESC.

3) move the cursor

Vi can be moved up, down, left, and right directly with the cursor on the keyboard, but the regular vi uses lowercase letters "h", "j", "k", and "l 」, the cursor is controlled to move one cell to the left, down, up, and right respectively.

Press ctrl + B to move the screen to the back.

Press ctrl + f to move the screen to the front.

Press ctrl + u to move the screen to the back half of the page.

Press ctrl + d to move the screen half to the front.

　

Note the following when using vi for the first time:
1. After opening a file with vi, it is in command mode. You must switch to Insert mode to Enter text. Switch method: click "I" under "command mode" to enter "Insert mode )」, now you can start to input text.
2. After editing, you must switch from the insert mode to the command line mode to save the file. to switch to the mode, Press ESC.
3. Save and exit the file: In command mode, enter wq! (Don't forget the one before wq :)

 

 

Here I only found the useful commands for me. For details, refer

Http://linux.chinaunix.net/doc/office/2005-01-24/898.shtml