Shell terminal character color settings

Shell terminal character color settings

When writing a program, the terminal usually needs to display various colors such as red or green on the output, so that users can be notified more clearly. The following is how to set the terminal color of the Shell system:

The Character Color of the terminal is controlled by escape sequence. It is a system display function in text mode and has nothing to do with the specific language,shell,python,perl,C,C++Can be called.
The escape sequence isESCCan start\033Complete the same job (The ASCII code of ESC is expressed in decimal format as 27, which is equivalent to 33 in octal format.).

 
 

  
  
Display format: \ 033 [display mode; foreground color; background color; Action m;
  
  
The display mode, foreground color, or background color have no sequential relationship, and none of them is required.
  
  
Default color: \ 033 [0 m
 
 

The color of the text terminal can be generated using an ANSI unconventional character sequence. Example:

echo -e “\033[44;37;5m ME \033[0m COOL”

The above command sets the background to blue, foreground white, blinking cursor, output character "ME", then reset the screen to the default settings, output characters“COOL”.“e”YesechoIs used to activate the parser for special characters.“\033”Guides unconventional character sequences.“m”This means to set the attribute and end the sequence of unconventional characters. The valid characters in this example are:“44;37;5”And“0”.

Modify“44;37;5”A combination of different colors can be generated. The values are irrelevant to the order of encoding. The optional encoding is as follows:

Encoding color/Action
 
 

  
  
0. Reset the property to the default setting.
  
  
1. Set bold
  
  
2. Set half brightness (simulate color display)
  
  
4. Set the underline to simulate the color of the color display)
  
  
5. Set flashing.
  
  
7. Set reverse Images
  
  
22. Set the general density
  
  
24. Close the underline
  
  
25 turn off flashing
  
  
27 disable reverse image
  
  
30 set the black foreground
  
  
31 set the red foreground
  
  
32. Set the green foreground
  
  
33 set the brown foreground
  
  
34 set the blue foreground
  
  
35 set purple foreground
  
  
36 set the blue foreground
  
  
37 set the white foreground
  
  
38. Set the underline on the default foreground color
  
  
39. Disable the underline on the default foreground color
  
  
40 set a black background
  
  
41 set the red background
  
  
42 set a green background
  
  
43 set brown background
  
  
44 set the blue background
  
  
45 set a purple background
  
  
46 set the blue background
  
  
47 set the white background
  
  
49 set the default black background
 
 

Other interesting code:

 
 

  
  
\ 033 [2J clear screen
  
  
\ 033 [close all keyboard lights with 0q
  
  
\ 033 [1 Q: Set the "Scroll Lock" indicator (Scroll Lock)
  
  
\ 033 [set the "numerical Lock" indicator (Num Lock) for 2q)
  
  
\ 033 [set "Caps Lock" for 3q)
  
  
\ 033 [15: 40 H move close to 15th rows, 40 Columns
  
  
\ 007 beep
 
 

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