shell终端输出内容美化

作者：James Zhu ([e-mail])

创建日期：2018-05-30

引言

我们在编写shell脚本（如bash/sh等）时，有时会因为输出内容过多而观察不便，因此需要将一些重要信息高亮显示。

ANSI转义序列是一种In-band signaling的转义序列标准，用于控制视频文本终端上的光标位置、颜色和其他选项。在文本中嵌入确定的字节序列，大部分以ESC转义字符和[字符开始，终端会把这些字节序列解释为相应的指令，而不是普通的字符编码。

ANSI转义序列表（不完整列表）

Set

Code	Description	Example
1	Bold/Bright	echo -e "Normal \e[1mBold"
2	Dim	echo -e "Normal \e[2mDim"
4	Underlined	echo -e "Normal \e[4mUnderlined"
5	Blink	echo -e "Normal \e[5mBlink"
7	Reverse	echo -e "Normal \e[7minverted"
8	Hidden	echo -e "Normal \e[8mHidden"

Unset

Code	Description	Example
0	Reset all attributes	echo -e "\e[0mNormal Text"
21	Reset bold/bright	echo -e "Normal \e[1mBold \e[21mNormal"
22	Reset dim	echo -e "Normal \e[2mDim \e[22mNormal"
24	Reset underlined	echo -e "Normal \e[4mUnderlined \e[24mNormal"
25	Reset blink	echo -e "Normal \e[5mBlink \e[25mNormal
27	Reset reverse	echo -e "Normal \e[7minverted \e[27mNormal"
28	Reset hidden	echo -e "Normal \e[8mHidden \e[28mNormal"

Foreground (text)

Code	Description	Example
39	Default foreground color	echo -e "Default \e[39mDefault"
30	Black	echo -e "Default \e[30mBlack"
31	Red	echo -e "Default \e[31mRed"
32	Green	echo -e "Default \e[32mGreen"
33	Yellow	echo -e "Default \e[33mYellow"
34	Blue	echo -e "Default \e[34mBlue"
35	Magenta	echo -e "Default \e[35mMagenta"
36	Cyan	echo -e "Default \e[36mCyan"
37	Light gray	echo -e "Default \e[37mLight gray"
90	Dark gray	echo -e "Default \e[90mDark gray"
91	Light red	echo -e "Default \e[91mLight red"
92	Light green	echo -e "Default \e[92mLight green"
93	Light yellow	echo -e "Default \e[93mLight yellow"
94	Light blue	echo -e "Default \e[94mLight blue"
95	Light magenta	echo -e "Default \e[95mLight magenta"
96	Light cyan	echo -e "Default \e[96mLight cyan"
97	White	echo -e "Default \e[97mWhite"

Background

Code	Description	Example
49	Default background color	echo -e "Default \e[49mDefault"
40	Black	echo -e "Default \e[40mBlack"
41	Red	echo -e "Default \e[41mRed"
42	Green	echo -e "Default \e[42mGreen"
43	Yellow	echo -e "Default \e[43mYellow"
44	Blue	echo -e "Default \e[44mBlue"
45	Magenta	echo -e "Default \e[45mMagenta"
46	Cyan	echo -e "Default \e[46mCyan"
47	Light gray	echo -e "Default \e[47mLight gray"
100	Dark gray	echo -e "Default \e[100mDark gray"
101	Light red	echo -e "Default \e[101mLight red"
102	Light green	echo -e "Default \e[102mLight green"
103	Light yellow	echo -e "Default \e[103mLight yellow"
104	Light blue	echo -e "Default \e[104mLight blue"
105	Light magenta	echo -e "Default \e[105mLight magenta"
106	Light cyan	echo -e "Default \e[106mLight cyan"
107	White	echo -e "Default \e[107mWhite"

参考资料

• ANSI escape code

• Bash tips: Colors and formatting