mattrib
mattrib功能说明：变更或显示MS-DOS文件的属性。
语 法：mattrib [+/-][ahrs][-/X][文件] 或 mattrib [-/X][文件]
补充说明：mattrib为mtools工具指令，模拟MS-DOS的attrib指令，可变更MS-DOS文件的属性。
参 数：
+/- "+"代表开启指定的文件属性。"-"代表关闭指定的文件属性。
a 备份属性。使备份程序可用来判断文件是否已经备份过。
h 隐藏属性。
r 只读属性。
s 系统属性。
-/ 列出指定目录及子目录下所有文件的属性。
-X 显示文件属性时，中间不输入空格。
mattrib
mattrib [options] filenames
Change attributes of MS-DOS files. See mtools for more information.
Attributes
To set an attribute, use one of the following letters preceded by a + (to turn the attribute on) or - (to turn it off):
Archive; mark the file as a new file that should be archived by backup programs.
Read-only.
System; files with this attribute are marked as operating system files.
Hide this file when displaying directory contents with DIR.
Options
When listing attributes, descend into all subdirectories recursively.
Concise output.
Display commands for mformat that can reproduce the current attributes and settings for a given disk.