Ansi (Not Ascii) Escape Code Terminal Move Cursor and Change Colors in Bash
Fleeting- External reference: https://developpaper.com/linux-tips-set-terminal-character-display-color-and-move-cursor-position-in-code/
Linux tips: set terminal character display color and move cursor position in code - Develop Paper
ANSI escape codes can be used to set character display color, move cursor position, clear character display and so on.
basic format is as follows: Esc[escape code
used\eEscape character to represent the ESC character
Bash shell, you can useechoImperative-eOption to test the ANSI escape code
ASCII encoding, the octal value of escape character is 033.
Then inechoIn the order,\033Represents the escape character.
printf command can also output ANSI escape code without adding-eOptions, such as ` printf “E [31m].
also be written asecho -e “\e[31m”，
implementecho -e “\e[0m"Command to reset the terminal properties
basic format of ANSI escape code for setting terminal character color is as follows: Esc[Value;…;Valuem
value colour
30 black
31 gules
32 green
33 yellow
34 blue
35 violet
36 Cyan
37 white
value colour
40 black
41 gules
42 green
43 yellow
44 blue
45 violet
46 Cyan
47 white
value Attribute meaning
0 Reset all properties, including character colors
1 Make it bold
4 Underline
5 Flash on
7 Color reversal
8 Show invisible text
The given foreground color and background color do not require sequence.
Escape code meaning
Esc[nA Move the cursor up n rows, and the number of columns remains unchanged. Move to the top of the terminal and do not move again
Esc[nB Move the cursor down n rows, and the number of columns remains unchanged. Move to the bottom of the terminal and do not move again
Esc[nC The cursor moves n columns to the right, and the number of rows remains unchanged. Move to the far right of the terminal and do not move again
Esc[nD The cursor moves n columns to the left, and the number of rows remains unchanged. Move to the left end of the terminal and do not move again
Esc[nE Move the cursor down n rows, and the number of columns changes to the beginning of the row
Esc[nF Move the cursor up n rows, and the number of columns changes to the beginning of the row
Esc[Line;ColumnH Move the cursor to the specified number of rows and columns. If no value is provided, the default value is 0
Esc[ColumnG Move the cursor to the column with the current number of rows unchanged
Esc[s Save the current cursor position, and then use ESC [u] to jump to the saved position
Esc[u Jump to the cursor position saved by ESC [S]
Esc[?25l Hide cursor (lowercase L after 25)
Esc[?25h Show cursor
tput
To ease doing all that stuff.
CYAN="$(tput setaf 6)"
RED="$(tput setaf 1)"
GREEN="$(tput setaf 2)"
OFF="$(tput sgr0)"
BOL="$(tput cr)"
KILL_LINE="$(tput el)"
echo -e "${RED}This is something that will be cleared ${BOL}${KILL_LINE}${CYAN}This is some ${OFF}other thing"
change the prompt color
You can also change color of the PS1 prompt using tput as shown below:
$ export PS1=”\[$(tput bold)$(tput setb 4)$(tput setaf 7)\]\u@\h:\w $ \[$(tput sgr0)\]“
tput Color Capabilities: tput setab [1-7] – Set a background color using ANSI escape tput setb [1-7] – Set a background color tput setaf [1-7] – Set a foreground color using ANSI escape tput setf [1-7] – Set a foreground color tput Text Mode Capabilities: tput bold – Set bold mode tput dim – turn on half-bright mode tput smul – begin underline mode tput rmul – exit underline mode tput rev – Turn on reverse mode tput smso – Enter standout mode (bold on rxvt) tput rmso – Exit standout mode tput sgr0 – Turn off all attributes
Color Code for tput: 0 – Black 1 – Red 2 – Green 3 – Yellow 4 – Blue 5 – Magenta 6 – Cyan 7 – White
— https://linux.101hacks.com/ps1-examples/prompt-color-using-tput/