vim Editor use

If we want to edit text or modify files in terminal mode, we can use VI/VIM Editor ,Ubuntu
Bring it with you VI Editor , however VI Editors are used to Windows It's inconvenient for people who develop under , For example, unexpectedly
You cannot use the up, down, left and right keys on the keyboard to adjust the cursor position . So I recommend that you use VIM Editor ,VIM Editor
yes VI Editor upgrade version ,VI/VIM Editors are instruction based editors , You don't need a mouse , There is no food
single , Just use the keyboard to do all the editing .
We need to install it first VIM Editor , The order is as follows ：
sudo apt-get install vim
After installation, you can use VIM The editor ,VIM The editor has 3 Working mode ： The input mode 、 Instructions
Mode and bottom line mode , Different functions can be completed by switching different modes , Let's take editing a text document as an example
Explain VIM Use of editor . Open the terminal , Enter the command ：

vi test.txt

We try to enter numbers in the figure , I found it impossible to input , This is not because your keyboard is broken . because VIM
The default is the document opened in read-only mode , So we need to switch to input mode , The command to switch to input mode is as follows ：
i In front of the current cursor character , Switch to input mode .
I Convert to input mode at the beginning of the line where the current cursor is located .
a After the character of the current cursor , Switch to input mode .
A At the end of the line where the cursor is located , Switch to input mode .
o Below the line of the current cursor , Create a new line , And switch to input mode .
O Above the line of the current cursor , Create a new line , And switch to input mode .
s Delete cursor character .
r Replace character at cursor .

Remember to exit more times when you need to esc key Exit edit mode , Try it first shift Key point out ： Press again w Key sum q Key to exit, as shown in the figure below