echo输出彩色文字

开启转义功能

echo -e表示开启转义功能，比如：

彩色文字语法

echo -e "\e[前景;背景;特效m""hello""\e[0m"，例如：

console_codes

代码	含义
0	reset all attributes to their defaults
1	set bold
2	set half-bright
4	set underscore
5	set blink
7	set reverse video
10	reset selected mapping, display control flag, and toggle meta flag
11	select null mapping, set display control flag, reset toggle meta flag
12	select null mapping, set display control flag, set toggle meta flag
21	set normal intensity
22	set normal intensity
24	underline off
25	blink off
27	reverse video off
30	set black foreground
31	set red foreground
32	set green foreground
33	set brown foreground
34	set blue foreground
35	set magenta foreground
36	set cyan foreground
37	set white foreground
38	set underscore on, set default foreground color
39	set underscore off, set default foreground color
40	set black background
41	set red background
42	set green background
43	set brown background
44	set blue background
45	set magenta background
46	set cyan background
47	set white background
49	set default background color