4. Text editor

Text editor

Vim

vim Multiple modes and operations :
Interactive mode （ The default mode ）： Cannot enter text
Insertion mode ： You can enter text , Alphabetic keyboard i、I、a、A、o、O Enter to insert different letters. After entering the insertion mode, the cursor position is different , Exit mode ESC
Command mode ：“:” Number key , Then enter the command to execute the command , After executing the command, it will return to interactive mode
Visual Modes （ Not commonly used ）

Vim operation
:w ： Save the file
:q ： Exit file
:q! ： Forced exit , Don't save changes
:wq： Save and exit
:g ： Line number +G Or line number +gg, In command mode set nu Show rows ,set nonu Don't show line numbers
/ ： Search from the current cursor to the end of the file ,n next N the previous
? ： Search from the current file to the beginning of the file
:%s/ Old string / New string /g： Replace file
r： Append the contents of a file to the current file