The shortcut key of command and the editing method under vi command

four。 Operating system command shortcut

1) use the arrow keys ↑ ↓-quickly access history commands (all input commands will be temporarily saved in memory-> saved in disk files)

2) move the cursor quickly

Ctrl + a-quickly move the cursor to the beginning of the line

Ctrl + e-quickly move the cursor to the end of the line

Ctrl + ← →-move the cursor quickly from side to side according to the word

3) Quick operation command information

Ctrl + u-cut the contents in front of the cursor

Ctrl + k-cut the content behind the cursor

Ctrl + w-cut each string information with spaces as delimits

Ctrl + y-paste the cut

4) Special feature shortcuts

Ctrl + c (cancel)-interrupt or cancel the command execution process

Ctrl + l (clear)-clear screen operation

Ctrl + s-enter the locked state

Ctrl + Q-exit locked state

five。 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 -:-> 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 to complete the functional operation wq! Q! /-search file information n look down N look up?-search file information n look up N look up 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

100ggMurray-switch to the file specified line

^-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

7) 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

Problem solving: problem 1: solution the first course: recover the data information before the interruption vi-r edit file information the second course: delete a hidden file description: in the linux system. The beginning of the file is to hide the file using ls-a to view the hidden file rm-f / oldboy/.oldboy.txt.swpvi command execution principle 1) Editing the file will produce a hidden file 2) is to edit the content directly in the hidden file 3) when saving the file, the hidden file is renamed