Archive:  core-linux_headless64-0.17.53-0.17.54-update.zip
  End-of-central-directory signature not found.  Either this file is not
  a zipfile, or it constitutes one disk of a multi-part archive.  In the
  latter case the central directory and zipfile comment will be found on
  the last disk(s) of this archive.
unzip:  cannot find zipfile directory in one of core-linux_headless64-0.17.53-0$
17.54-update.zip or
        core-linux_headless64-0.17.53-0.17.54-update.zip.zip, and cannot find c$
re-linux_headless64-0.17.53-0.17.54-update.zip.ZIP, period.
root@buzz-factorio-server:~/Downloads# unzip core-linux_headless64-0.17.53-0.17$
54-update.zip .
Archive:  core-linux_headless64-0.17.53-0.17.54-update.zip
  End-of-central-directory signature not found.  Either this file is not
  a zipfile, or it constitutes one disk of a multi-part archive.  In the
  latter case the central directory and zipfile comment will be found on
  the last disk(s) of this archive.
unzip:  cannot find zipfile directory in one of core-linux_headless64-0.17.53-0$
17.54-update.zip or
        core-linux_headless64-0.17.53-0.17.54-update.zip.zip, and cannot find c$
re-linux_headless64-0.17.53-0.17.54-update.zip.ZIP, period.