Three modes of vim:

The relationship between the three modes of vim

Command mode: the mode entered at the beginning

• Move the cursor (up, down, left and right)

  1, Jump between lines: the beginning goes directly to the end (end or $), and the end goes directly to the beginning(^ or 0)

  2, Jump between multiple lines: last line (G), first line (gg), 10th line (10G)

• Copy whole line (yy), copy multiple lines (number yy), copy one word (yw)

• Paste: p (paste to the next line where the cursor is), (big) P (the previous line where the cursor is)

• Cut the whole line (dd), cut the number of lines (#dd)

• Delete

  1. Delete a single letter: x del
  2. Delete the cursor to the beginning:d^
  3. Delete the cursor to the end: d$
  4. Delete a word: dw

• Undo once (u), undo all (big U)

• Replacement mode (r): one character can be replaced, no additional characters can only be replaced

• Big R: the fourth mode, the replacement mode (whatever you type will always replace the characters you type)

• Exit: zzsave exit

• Find content (/the character you want), n (down), N (up)

Display line number: set nu

Understand:
Jump to the current page:
H: Top of page
M: Middle line of page
L: Bottom of page
zt: Move the current line where the cursor is located to the top of the screen
zz: move the current line where the cursor is located to the middle of the screen
zb: move the current line where the cursor is located to the bottom of the screen

Input Mode

• i: insert, type where the cursor is
• I: Type at the beginning of the line where the current cursor is located
• a: append, enter after the cursor position
• A: Type at the end of the line where the current cursor is located
• o: Opens a new line below the current cursor line
• O: open a new line above the current cursor line

Last line mode

Options	Action
set all	Show all command options
set nu	Show line numbers
set noun	Close line numbers
set cul	Show underline
set nocul	Turn off underline
set list	Show hidden characters
set key=the secret you set	Encryption
set key=Nothing to lose	Release Password
set ai	Auto-indent
w	Save
q	Exit
!	Mandatory
w +path	Save As
r + file path	Add another file to the current file editor
. ! Command	Read the command result and write it to the current file

Find Replace in Last Line Mode

Range s/old characters/new characters/modifiers

Scope

• Do not write, the default cursor current line
• #, # a certain line to a certain line (# represents the number 2, 20: 2 to 20 lines)
• %, representing the full text

s
Command search (search)

/ , #, @
Separator

Old characters
What you are looking for or what you are replacing (you can use *^)

New character
The character you want to replace the old character with (* cannot be used)

Modifier
i: case insensitive
g: all hits in the entire line are replaced (if not g, only the first hit in the entire line is replaced)

In the configuration file, the behavior comments beginning with # do not take effect

Begin all lines with #(:%s/^/#/g)

The delimiter can be / # @ can be used (% s#/sbin/nologin#/zz/#g)