Shulou(Shulou.com)06/02 Report--

Edit command using method vi/vim

1) Edit command mode information

Command mode: can realize special function operation

Edit mode: you can edit file content information

Bottom line mode: you can enter special command information wq q wq! Q!

Command mode-I-> edit mode-esc- > command mode

Command mode -:-> bottom line mode-esc- > command mode

2) Command mode-> edit mode

I-enter edit mode directly at the cursor position

I-switch the cursor to the beginning of the line to enter edit mode

A-enter edit mode with one character below the cursor

A-switch the cursor to the end of the line and enter edit mode

O-insert a new line below the line of the cursor and enter the editing state

O-insert a new line above the line of the cursor and enter the editing state

S-delete the character where the cursor is located and enter the editing state

S-delete the line of the cursor and enter the editing state

3) Command mode-> bottom line mode

:-enter the bottom line mode and complete the functional operation wq! Q!

/-search for file information n look down N look up

?-search file information n look up N look down

PS: ignore case to find data in files

/ oldboy\ c

4) how to move the cursor quickly (command mode)

G-switch to the last line of the file

Gg-switch to the first line of the file

100g-switch to the file specified line

100gg

^-switch to the beginning of a line

$- switch to the end of a line

5) how to complete special editing operations

Yy-copy the specified line information

Nyy-copy multiple lines of information

P-paste the copied content on the specified line

Np-paste the copied content multiple times on the specified line

Dd-delete the specified line information (essentially cut)

Ndd-delete the specified multi-line information (essentially cut)

DG-delete all lines after the cursor

C-delete the content after the cursor and enter the editing state

R-replace the specified character information

R-continuously replace multiple character information

6) Command mode special function operation

U-withdraw operation undo

Ctrl+r-cancel the withdrawal of redo

Bottom line mode special function operation

: set nu-display line number information

: set nonu-cancel line number display

Common errors in editing commands

Error 01: edit commands can only edit files

Error 02: you must specify to edit the file

Error 03: edit file directory must exist

Error 04: error message is displayed and cannot be edited properly

Analyze the cause of the problem:

1) A sudden interruption occurred while editing the file

2) the file was edited by multiple users at the same time

To resolve the problem:

Problem 1: solution

The first course: recover the data information before the interruption

Vi-r Editing file information

The second course: delete a hidden file

Description: in the linux system with. The initial file is the hidden file.

Use ls-a to view hidden files

Rm-f / oldboy/oldboy.txt.swp

Principle of vi command execution

1) Editing a file results in a hidden file

2) edit the content directly in the hidden file

3) when you save a file, you rename the hidden file

Directory structure information under linux system / directory

PS: all data in the system is a file

Boot-storing boot system startup file information similar to windows system c:/windows

Etc-system service configuration file save directory

Opt/usr-the directory saved by the third software program installed by the user Program Files

Root-the home of the system user's home directory super admin user (Imperial Palace)

Home-system user's home directory the home of ordinary users (ghetto)

Var-Syslog file save directory

Tmp-temporary storage data directory is similar to the windows Recycle Bin

Sbin-binary file = = command file super Binary

Bin-binary file = = command file Binary

Dev -?

Mnt -?

Media-store audio and video pictures

Sys/proc--?

Lib-library adjust the sauce development code needs to use the library file saved directory 32-bit program required library file

Lib64-the library files required by library 64-bit programs

Official information at the directory level: http://www.pathname.com/fhs/pub/fhs-2.3.html

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