[Color_Test]: http://data.linuxtoy.cn/image/EscapeSequence_ColorControl.png "Escape sequence color test"

# Shell 终端颜色控制

Shell通过转义字符序列来控制颜色和光标等行为

格式:
`echo -e "\033[Attribute code;Frontground color code;Background color code m"`
Attribute code, Frontground, Background 是可选的，可以只有其中一个选项
echo -e的目的是让echo识别转移字符
\033是表示escape的八进制表示

| Escape sequence | Attribute               |
| ---             | ---                     |
| 0               | 关闭所有属性 none       |
| 1               | 加粗         bold       |
| 4               | 下划线       underscore |
| 5               | 闪烁         blink      |
| 7               | 反显         reverse    |
| 8               | 消影         concealed  |
| nA              | 光标上移n行             |
| nB              | 光标下移n行             |
| nC              | 光标右移n列             |
| nD              | 光标左移n列             |
| y;xH            | 设置光标位置            |
| 2J              | 清屏                    |
| K               | 清除从光标到行尾的内容  |
| s               | 保存光标位置            |
| u               | 恢复光标位置            |
| ?25l            | 隐藏光标                |
| ?25h            | 显示光标                |


--------------------------------------------
| Color        | Front ground | Back ground |
| ---          | ---          | ---         |
| 黑色  black  | 30           | 40          |
| 红色  red    | 31           | 41          |
| 绿色  green  | 32           | 42          |
| 黄色  yellow | 33           | 43          |
| 蓝色  blue   | 34           | 44          |
| 紫色  purple | 35           | 45          |
| 青色  cyan   | 36           | 46          |
| 白色  white  | 37           | 47          |

例:
```
echo -e "\033[0;30m Color test - Front Black!\033[0m"
echo -e "\033[0;31m Color test - Front Red!\033[0m"
echo -e "\033[0;32m Color test - Front Green!\033[0m"
echo -e "\033[0;33m Color test - Front Yellow!\033[0m"
echo -e "\033[0;34m Color test - Front Blue!\033[0m"
echo -e "\033[0;35m Color test - Front Purple!\033[0m"
echo -e "\033[0;36m Color test - Front Cyan!\033[0m"
echo -e "\033[0;37m Color test - Front White!\033[0m"

echo

echo -e "\033[0;30;47m Color test - Front Black, Back White!\033[0m"
echo -e "\033[0;31;46m Color test - Front Red,   Back Cyan!\033[0m"
echo -e "\033[0;32;45m Color test - Front Green, Back Purple!\033[0m"
echo -e "\033[0;33;44m Color test - Front Yellow,Back Blue!\033[0m"
echo -e "\033[0;34;43m Color test - Front Blue,  Back Yellow!\033[0m"
echo -e "\033[0;35;42m Color test - Front Purple,Back Green!\033[0m"
echo -e "\033[0;36;41m Color test - Front Cyan,  Back Red!\033[0m"
echo -e "\033[0;37;40m Color test - Front White, Back Black!\033[0m"
```
效果如下：
![Escape Sequence Color test][Color_Test]