The VIM editor for Linux

About VI
1. VI is a widely used text editing program in a variety of UNIX and Linux systems.
2. VI is not a typesetting program, but a purely text-editing program.
3. VI is a full screen text editor, it has no menus, only commands.
4. VI is not window-based, so this multi-purpose editing program can be used to edit a wide variety of files on any type of terminal.
5. vi function is very powerful, but command a wide range of proficiency in a certain degree of difficulty.
6. The inventor of VI: Bill Joy

VI Start-up
$ VI filename or $ VI
If filename already exists, VI will open the existing file
If it is a new file, VI will create it

Vi. exit of VI
Enter in command-line mode: q,:q! ,: Wq or: X, you can exit VI
: W Save
: w filename saved as filename
: wq! Save and exit
: wq! FileName is saved with filename and then exited
: q! Do not save exit
: x Save and exit, function and: wq! same

VI Mode of operation
VI has three modes of operation, namely: Command mode, insert mode (edit mode) and last line mode, three modes perform different operations respectively, they can be switched between the two. 1. Command mode: After entering VI, the first entry is the command mode, waiting for the user to enter the editing command, the letter entered at this time as an edit command to explain.
2. Insert mode: Enter insert command in command mode I, additional command A, open command O and other commands can enter the insertion mode, in the Insert mode, the user input can edit the text, any input characters are saved as the contents of the file. The "ESC" key returns to the command mode.
3. Last line mode: In command mode, press ":" Key to enter the last line mode, the VI cursor will be displayed in the final line of the window, ":" As a prompt for the last row mode, waiting for the user to enter the command. After the last command executes, VI automatically returns to the command mode.






command to enter VI
VI FileName: Opens or creates a new file and places the cursor at the beginning of the first
VI +n FileName: Opens the file and places the cursor at the beginning of nth
VI + FileName: Opens the file and places the cursor at the beginning of the last line
VI +/pattern FileName: Opens the file and places the cursor at the first string that matches the pattern
Vi-r FileName: The last time you were editing with VI, a system crash occurred, restoring filename
VI filename....filename: Open multiple files, edit them sequentially

Move Cursor Class command
H: Move the cursor one character to the left
L: Move the cursor right one character
Space: Move the cursor right one character
Backspace: Cursor moves left one character
K or ctrl+p: Move the cursor up one line
J or CTRL + N: Move the cursor down one line
Enter: Move the cursor down one line
W or W: Move the cursor right one word to the beginning of the word
B or B: The cursor moves left one word to the beginning of the word
E or E: Move the cursor right one word to the end of the word
): Move the cursor to the end of the sentence
(: The cursor moves to the beginning of the sentence
}: Move the cursor to the beginning of the paragraph
{: Cursor moves to end of paragraph
NG: Cursor moves to the beginning of nth
n+: The cursor moves down n rows
N: Move the cursor up n rows
n$: Cursor moves to end of Nth line
H: Move the cursor to the top row of the screen
M: Move the cursor to the middle line of the screen
L: The cursor moves to the last line of the screen
0: (note is the number 0) cursor moves to the beginning of the current line
$: Cursor moves to the end of the current line

Screen Tumbling Class command
Ctrl+u: First half screen to file
Ctrl+d: Half-screen to the end of the file
CTRL+F: Flip a screen to the end of a file
ctrl+b; Turn one screen to the top of the file
NZ: Rolls line N to the top of the screen and scrolls the current line to the top of the screen when n is not specified.

Insert Text Class command
I: Before the cursor
I: At the beginning of the current
A: After the cursor
A: At the end of the current line
O: A new line below the current line
O: New row above the current line
R: Replace the current character
R: Replaces the current character and its characters until the ESC key is pressed
S: replaces the specified number of characters with the input text starting at the current cursor position
S: Deletes the specified number of rows and replaces them with the input text
NCW or NCW: Modifies a specified number of words
NCC: Modifying a specified number of rows

Delete command
NDW or NDW: Delete the n-1 characters at the beginning and after the cursor
Do: Delete to the beginning of the line
d$: Delete to end of line
NDD: Deletes the current line and its subsequent n-1 rows
X or x: Deletes a character, x deletes the cursor, and x deletes the cursor before the
Ctrl+u: Delete text entered under input mode

Search and Replace commands
/pattern: Searches for pattern at the end of the file from the beginning of the cursor
? pattern: Searches for pattern from the beginning of the cursor to the top of the file
N: Repeat the last search command in the same direction
N: Repeats the last search command in the opposite direction
: s/p1/p2/g: Replaces all P1 in the current row with P2
: n1,n2s/p1/p2/g: All P1 in line N1 to N2 are replaced with P2
: g/p1/s//p2/g: Replace all P1 in the file with P2

Option settings
All: List all option settings
Term: Set terminal type
Ignorance: ignoring case in search
List: Display tab stops (CTRL+I) and end-of-line flags ($)
Number: Show line numbers
Report: Displays the number modified by the line-oriented command
Terse: Displays a short warning message
Warn: Displays no write message if the current file is not saved when you go to another file
Nomagic: Allows the use of special characters that are not preceded by "\" In search mode
Nowrapscan: Prohibit VI from the other end when the search reaches the end of the file
MESG: Allow VI to display information that other users write to their terminal using write

Last line mode command
: N1,N2 CO N3: Copy the contents of the N1 line to the N2 row below the N3 line
: n1,n2 m N3: Move the contents of the N1 line to the N2 line below the N3 line
: n1,n2 d: Delete the contents of N1 rows to N2 rows
: w: Save current file
: E filename: Open file filename for editing
: x: Save current file and exit
: Q: Exit VI
: q!: Do not save file and Exit VI
:!command: Execute shell command
: n1,n2 W!command: The contents of the N1 line to the N2 line in the file are entered as command and executed, and if N1,N2 is not specified, the entire file content is entered as the command
: R!command: The output of command commands is placed in the current line