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I recently downloaded a large number of GIS data files from a government agency to a file server and need to unzip all of them via the command line. However, unzip is returning "Unsupported compression method 14". What does this mean? How can I extract the files?

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migrated from Oct 27 '11 at 20:36

This question came from our site for system and network administrators.

up vote 13 down vote accepted

These files were compressed using the LZMA algorithm (possibly using WinZip). LZMA archives are not supported by the unzip command. I found that I could extract these files using 7z instead, as follows:

  1. Install p7zip (from source or package manager)
  2. 7z x
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WinZip specific compression method codes are available here. – jscott Sep 30 '11 at 0:35

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