I received a zip file from a bank. I get the following error when I trying to unzip it.
unzip filename.zip Archive: filename.zip skipping: SOME_STUFF.pdf need PK compat. v6.1 (can do v4.6)
file command returns
Zip archive data
for this file.
There are a fair number of threads containing this error message, but the only concrete suggestions they have is to use
7z x or
7za x from the
p7zip-full package. These fail with the error:
Unsupported Method Sub items Errors: 1
I'm using Debian wheezy amd64. I don't see significant updates of the
7za packages in testing/unstable though.
I'd appreciate suggestions of how to unzip this file, and more generally, what does the error message
PK compat. v6.1 (can do v4.6) mean? For a widely used utility,
zip does not have much documentation available about it. The README in the Debian sources points to http://www.info-zip.org/pub/infozip/ which lists a release dated of 29th April 2009 for UnZip 6.0.
Here is the version output for the
unzip binary on my system.
unzip -v UnZip 6.00 of 20 April 2009, by Debian. Original by Info-ZIP. Latest sources and executables are at ftp://ftp.info-zip.org/pub/infozip/ ; see ftp://ftp.info-zip.org/pub/infozip/UnZip.html for other sites. Compiled with gcc 4.7.2 for Unix (Linux ELF) on Feb 3 2015. UnZip special compilation options: ACORN_FTYPE_NFS COPYRIGHT_CLEAN (PKZIP 0.9x unreducing method not supported) SET_DIR_ATTRIB SYMLINKS (symbolic links supported, if RTL and file system permit) TIMESTAMP UNIXBACKUP USE_EF_UT_TIME USE_UNSHRINK (PKZIP/Zip 1.x unshrinking method supported) USE_DEFLATE64 (PKZIP 4.x Deflate64(tm) supported) UNICODE_SUPPORT [wide-chars, char coding: UTF-8] (handle UTF-8 paths) LARGE_FILE_SUPPORT (large files over 2 GiB supported) ZIP64_SUPPORT (archives using Zip64 for large files supported) USE_BZIP2 (PKZIP 4.6+, using bzip2 lib version 1.0.6, 6-Sept-2010) VMS_TEXT_CONV WILD_STOP_AT_DIR [decryption, version 2.11 of 05 Jan 2007] UnZip and ZipInfo environment options: UNZIP: [none] UNZIPOPT: [none] ZIPINFO: [none] ZIPINFOOPT: [none]
dpkg reports the package version as
The output of
zipinfo filename.zip Archive: filename.zip Zip file size: 6880 bytes, number of entries: 1 -rw-a-- 6.4 fat 10132 Bx defN 15-Feb-06 16:24 SOME_STUFF.pdf 1 file, 10132 bytes uncompressed, 6568 bytes compressed: 35.2%