libmagic thinks docx is application/octet-stream

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On my Ubuntu 18 workstation when I check the mime type for a Word docx file I get the following:



$ file --mime src/tests/data_sources/test_data/word.docx
src/tests/data_sources/test_data/word.docx: application/vnd.openxmlformats-officedocument.wordprocessingml.document; charset=binary


Perfect, however if I start an 'ubuntu:18.04' docker container on my gitlab CI instance I get the following:



$ file --mime src/tests/data_sources/test_data/word.docx
src/tests/data_sources/test_data/word.docx: application/octet-stream; charset=binary


What could be the reason for this? And any ideas how to fix it? On both systems I'm just cloning a git repo containing this file then running the above command.



Thanks in advance










share|improve this question




























    0















    On my Ubuntu 18 workstation when I check the mime type for a Word docx file I get the following:



    $ file --mime src/tests/data_sources/test_data/word.docx
    src/tests/data_sources/test_data/word.docx: application/vnd.openxmlformats-officedocument.wordprocessingml.document; charset=binary


    Perfect, however if I start an 'ubuntu:18.04' docker container on my gitlab CI instance I get the following:



    $ file --mime src/tests/data_sources/test_data/word.docx
    src/tests/data_sources/test_data/word.docx: application/octet-stream; charset=binary


    What could be the reason for this? And any ideas how to fix it? On both systems I'm just cloning a git repo containing this file then running the above command.



    Thanks in advance










    share|improve this question
























      0












      0








      0








      On my Ubuntu 18 workstation when I check the mime type for a Word docx file I get the following:



      $ file --mime src/tests/data_sources/test_data/word.docx
      src/tests/data_sources/test_data/word.docx: application/vnd.openxmlformats-officedocument.wordprocessingml.document; charset=binary


      Perfect, however if I start an 'ubuntu:18.04' docker container on my gitlab CI instance I get the following:



      $ file --mime src/tests/data_sources/test_data/word.docx
      src/tests/data_sources/test_data/word.docx: application/octet-stream; charset=binary


      What could be the reason for this? And any ideas how to fix it? On both systems I'm just cloning a git repo containing this file then running the above command.



      Thanks in advance










      share|improve this question














      On my Ubuntu 18 workstation when I check the mime type for a Word docx file I get the following:



      $ file --mime src/tests/data_sources/test_data/word.docx
      src/tests/data_sources/test_data/word.docx: application/vnd.openxmlformats-officedocument.wordprocessingml.document; charset=binary


      Perfect, however if I start an 'ubuntu:18.04' docker container on my gitlab CI instance I get the following:



      $ file --mime src/tests/data_sources/test_data/word.docx
      src/tests/data_sources/test_data/word.docx: application/octet-stream; charset=binary


      What could be the reason for this? And any ideas how to fix it? On both systems I'm just cloning a git repo containing this file then running the above command.



      Thanks in advance







      ubuntu files






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Mar 8 at 17:30









      RichardRichard

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