How to use Linux vi command

1. Three modes and switching

①Command line mode ①Insert mode (enter file editing, press ESC to enter bottom line mode) ③Bottom line Mode

2. vi mode switching command

a a ---> [Enter the editing state, insert one character after the current cursor position]

A --- > [Enter the editing state, insert characters from the end of the current line]

      i     ---> [Enter the editing state, insert characters from the previous position of the current cursor]

                                                                                         -> [Enter the editing state, insert characters from the beginning of the current line]

o   ---> [Enter the editing state, insert a line, move the cursor to the beginning of the line and start inserting characters]

O ---> [Enter the editing state, add a blank line before the cursor, move the cursor to the beginning of the line and start inserting characters]

ESC ---> Enter the command state

:![ Command] Execute external Command command in vi editor [:!date] View the current time

3, paste and copy

[N]x ---> (Expurgate) Delete from N consecutive characters starting from the cursor

[N]dd ---> (delete) Delete N consecutive characters starting from the cursor and copy them to the editing buffer

[N]yy - --> (yank) Responsible for moving N lines from the cursor to the buffer

p(P) ---> (Put) Responsible for moving text from the editing buffer to the cursor

u ---> (undo) Cancel the last operation

4, save and exit

:q ---> (quit) Exit the unmodified file

:q! ---> Force exit without saving the modified parts

:w ---> (Write) Save the file without exiting

:x -- -> (Exit) Save the file and exit

:w File ---> Save as File, do not exit

:r File ---> Read the File content and insert it into Cursor position

5. [Advanced command] Cursor command

h ---> Move left

l ---> Move right

j --->Move down

k Move up

:N :N ---> Move the cursor to line N

1G ---> Move to The first line of the cursor’s file

G ---> Move to the last line

:set number ---> Set the displayed line number

:set nonumber - --> Cancel display of line number

6. [Advanced command] Search command

/string ---> Search string [n continues to search downwards, N continues to search in reverse direction , supports regular expression search: /^the】

7. [Advanced command] Replacement command

Use the :s command to implement string replacement

:s/str1/ str2/ ---> [:range s/ old/ new] Default current line

:s/str1/str2/g ---> g Replace all, without g only replace one

: .,$s/str1/str2/g ---> Replace the current line to the last line

:1,$s/str1/str2/g ---> The first line to the last line, full text

: %s/str1/str2/g ---> Full text

8. [Advanced command] is responsible for cutting commands

y0 ---> Copy the cursor to the beginning of the line, [copy part of the line]

y$ ---> Cursor to the end of the line

d0 ---> Cursor to the line Cut the first character into the clipboard

  d$  ---> Cut the character from the cursor to the end of the line into the clipboard

range y ---> Block copy, [: 119,125 y] [:,$y]

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