有文件的基本操作，查 找 文 件，与文件目录相关的命令操作，文件、文件夹的复制和移动，文 件 修 改，文件的读取与保存，文 件 管 理等内容- Have the basic operation of the file, find the file, and the file directory related to the operation of the command, files, folders, copy and move, file changes, the file read