exiftool提取excel 元数据

root@kali:~# file a.xlsx
a.xlsx: Microsoft Excel 2007+
root@kali:~# exif
exifautotran  exiftool
root@kali:~# exiftool a.xlsx
ExifTool Version Number         : 8.60
File Name                       : a.xlsx
Directory                       : .
File Size                       : 23 kB
File Modification Date/Time     : 2014:11:03 10:07:44+00:00
File Permissions                : rw-r--r--
Warning                         : Install Archive::Zip to decode compressed ZIP information
File Type                       : ZIP
MIME Type                       : application/zip
Zip Required Version            : 20
Zip Bit Flag                    : 0x0006
Zip Compression                 : Deflated
Zip Modify Date                 : 1980:01:01 00:00:00
Zip CRC                         : 0x7ff88d87
Zip Compressed Size             : 406
Zip Uncompressed Size           : 1456
Zip File Name                   : [Content_Types].xml