中国DOS联盟

To query all MP3 files under drive E:

The commands DIR /S/B E:\*.MP3 and DIR E:\*.MP3 /S/B both work, but DIR E:\*.MP3 does not. Why is it necessary to have parameters?

/s means including subfolders. Your mp3 files are placed in a folder. If you place them in the current directory, you don't need parameters.

The parameter /S has the meaning of searching. If this parameter is not present, all MP3 files in drive E: cannot be found, only the MP3 files in the root directory of drive E: can be found.

DIR attributes]]
sortorder]] timefield]]


Specifies the drive, directory, and/or files to list.

/A Displays files with specified attributes.
attributes D directory R read-only file
H hidden file A file ready for archiving
S system file - prefix meaning "not"
/B Uses empty format (no header information or summary).
/C Displays thousand separator in file sizes. This is the default. Use /-C to
disable separator display.
/D Same as wide, but files are listed in columns.
/L Uses lowercase.
/N New long list format where filenames are on the far right.
/O Lists files in sorted order.
sortorder N by name (alphabetic) S by size (smallest first)
E by extension (alphabetic) D by date/time (oldest first)
G directories first - prefix to reverse order
/P Pauses after each screenful of information.

Top the 2nd and 3rd floors.