最後更新: 2024-04-18

echo & escape

The -e option of the echo command enable the parsing of the escape sequences.

In Bash, the <Esc> character can be obtained with the following syntaxes:

• \e
• \033
• \x1B

Text Color & Reset

• black='\e[0;30m'
• white='\e[0;1;37m'
• dark_gray='\e[1;30m'
• light_gray='\e[0;37m'

• red='\e[0;31m'
• green='\e[0;32m'
• yellow='\e[0;33m'
• blue='\e[0;34m'
• magenta='\e[0;35m'
• cyan='\e[0;36m'

Light

• Light Red     1;31
• Light Green   1;32
• Yellow        1;33
• Light Blue    1;34
• Light Purple  1;35
• Light Cyan    1;36

Reset attributes(color)

clear='\e[0m'

The ”\e[0m” sequence removes all attributes (formatting and colors)

Text Color Examples

echo -e "The color is: ${red}red${clear}!"

彩虹

for (( i = 30; i < 38; i++ )); do echo -e "\e[0;"$i"m Normal: (0;$i); \e[1;"$i"m Light: (1;$i)"; done; echo -e "\e[0m"

Text background color

• bg_red='\e[0;41m'
• bg_green='\e[0;42m'
• bg_yellow='\e[0;43m'
• bg_blue='\e[0;44m'
• bg_magenta='\e[0;45m'
• bg_cyan='\e[0;46m'

tput

The tput utility uses the terminfo database to make the values of terminal-dependent capabilities and
 information available to the shell (see sh(1)), to initialize or reset the terminal,or
 return the long name of the requested terminal type.

Tput produces character sequences that are interpreted by the terminal as having a special meaning.

Usage

• tput setab [1-7]   # Set the background colour using ANSI escape
• tput setaf [1-7]    # Set the foreground colour using ANSI escape
• tput sgr0             # Reset text format to the terminal's default

Num  Colour    #define         R G B

0    black     COLOR_BLACK     0,0,0
1    red       COLOR_RED       1,0,0
2    green     COLOR_GREEN     0,1,0
3    yellow    COLOR_YELLOW    1,1,0
4    blue      COLOR_BLUE      0,0,1
5    magenta   COLOR_MAGENTA   1,0,1
6    cyan      COLOR_CYAN      0,1,1
7    white     COLOR_WHITE     1,1,1

i.e.

echo "$(tput setaf 1)Red text $(tput setab 7)and white background$(tput sgr 0)"

應用

redC=`tput setaf 1`
greenC=`tput setaf 2`
resetC=`tput sgr0`
echo "${redC}red text ${greenC}green text${resetC}"