LINUX Study Notes 2-file programming

A) vi is the first full-screen interactive editor in linux. B ). Vi has three working modes: command line mode, insert mode, and bottom line mode. c) basic functions: 1. go to edit: vihello. c2. Type I to enter the insert mode. 3. type [ESC] to return to command line mode 4...

 

A) vi is the first full-screen interactive editor in linux.

 

B ). Vi has three working modes: command line mode, insert mode, and bottom line mode.

 

C) basic functions:

 

1. go to edit: vi hello. c

 

2. Type I to enter the insert mode.

 

3. type [ESC] to return to the command line mode.

 

4. type: Enter the baseline mode.

 

5. type: wq save and exit

 

D) function keys in command line mode:

 

1. • yy: Copy the row where the current cursor is located

 

2. • [n] yy: n is a number. copy the n rows starting with the current cursor.

 

3. • p: Paste the copied content to the next line where the cursor is located

 

4. • dd: delete the row where the current cursor is located

 

5. • [n] dd: delete n rows starting with the row where the current cursor is located

 

6. •/name: find the string named "name" after the cursor

 

7. • G: Move the cursor to the end of the file (uppercase)

 

8. • u: cancel the previous action (in lower case)

 

E) base row mode function keys:

 

1. •: w save

 

2. • q exits vi (the system will prompt to save the changes)

 

3. •: q! Force exit (do not save changes)

 

4. •: wq is saved and then exited.

 

5. •: w [filename] Save the file as filename

 

6. •: set nu displays the row number

 

7. •: set nonu cancel row number

From the column of Ainemo