Linux operating system using the vi editor, Detailed

Introduction to the vi editor

• vi editor is the most basic Linux and Unix text editor, working in text mode. Since no graphical interface, vi is a highly efficient text editor. Although there are many graphical editors available on Linux, but vi and server management functions in the system are those graphics editor can not match.
• vi is not a layout editor program, it is not WPS as Word or other attributes may be organized fonts, formatting, paragraphs, etc., it is only a text editing program. No menu, only the command, and command range. vi There are three basic modes: command-line mode, text input mode and line mode.
• Vi enhanced version of Vim is easier to use than vi. vi commands can be used in almost all the vim.

The role of the text editor

• Create or modify text files

• Maintaining Linux systems in a variety of configuration files

Linux is the most commonly used text editor

• vi: UNIX-like operating system's default text editor

• vim: vim is an enhanced version of the vi text editor (generally referred to as the vi editor) of

Operating modes vi editor

Three operating modes

mode	effect
Command Mode	In this mode, the user can input various legal Vi command to manage their documents.
Input Mode	In this mode, any character entered by the user are saved vi as the contents of the file, and displays it on the screen.
Line mode	Most file management commands are executed in this mode, the last line command after the implementation, Vi automatically return to command mode.

Switching between different modes

hot key	effect	hot key	effect
a	Is inserted before the cursor	i	Inserted after the cursor
O	The next line where the cursor is inserted	O	Insert the cursor line
:	Line mode	Esc	Exit the current mode and return to command mode

Basic operation command mode

Move the cursor

Action Type	Operation keys	Features
Direction	↑、↓、←、→	up down left right
Next page	Page Down或Ctrl+F	Scroll down the entire page content
	Page Up或Ctrl+B	Flip up the whole page content
Quick Jump in the line	Home key or "^", the number "0"	Jump to the beginning of the line
	End key or "$" button	Jump to the end of the line
Quick jump between the lines	1G or gg	Jump to the first line of the file
	G	Jump to the end of the line in the file
	#G	Jump to file the first line #
Display line numbers	: Not set	Line numbers displayed in the editor
	:set nonu	The line number is displayed to cancel the editor

Copy, paste, delete

Action Type	Operation keys	Features
delete	x or Del	To delete a single character at the cursor
	dd	Delete the current cursor row
	#dd	# Delete the contents of the line starting from the cursor line
	d^	Delete all the characters before the current cursor to the beginning of the line
	d$	Delete all the characters in the current cursor to the end of the line
	dw	Delete the word at the cursor location
copy	yy	Copy the contents of the entire line of the current line to the clipboard
	#yy	# Copy the contents of the line starting from the cursor line
Stick	p	After the contents of the buffer is pasted to the cursor position
	P	Before pasting the cursor position

Find the file contents

Operation keys	Features
/word	Find a string from the top down "word" in the file
?word	From the bottom up search string "word" in the file
n	Locating a next matching search string
N	Positioning a matching search string

Undo edit and save and exit

Operation keys	Features
in	Press once to cancel the last operation, repeat u key to restore multiple operations
The	To cancel all edits to the current row than done
ZZ	Save the current file and exit the vi editor

The basic operation of the line mode

Save the file and exit the vi editor

Features	command	Remark
save document	:w	Save the modified contents
	:w /root/newfile	Save as another file
Exit vi	:q	Unmodified exit
	:q!	Abandon contents of the file and exit vi
Save the file and exit	:wq	Save the modified contents and exit

Open a new file or read other file content

command	Features
:e /install.log	Open a new file for editing
:r /etc/filesystems	Read other file contents in the current document I

Replace the contents of the file

command	Features
:s/old/new	The current row find the first character in "old" string is replaced with "new"
:s/old/new/g	The current row to find all the strings "old" is replaced with "new"
:#,# s/old/new/g	Replace all strings "old" the row number "#," the range "new"
:s/old/new/c	In the Replace command to join the end of the c command. Each action will prompt the user for confirmation to replace

Vi editor keyboard comes bitmap