title: tar: /: file changed as we read it. Does this mean that tar skipped one or more files?
body: <p>I am running Ubuntu 16.0.4 LTS and I'm compressing a directory that contains 32Gb of (CSV) files, so that I can remove the 800k+ files in my directory and create some space..</p>
  
  <p>I run the following command <code>tar czxvf /path/to/archive.tar.gz /path/to/source/directory</code></p>
  
  <p>The last line before the command prompt returned (i.e. tar completed the task) was:</p>
  
  <blockquote>
    <p>tar: /path/to/some/folder: file changed as we read it.</p>
  </blockquote>
  
  <p>From the tar documentation, this is <strong>only</strong> a warning message. However, I need assurance that the 800K+ files have all been correctly archived and compressed by tar, before deleting the original files.</p>
  
  <p>Does the fact that the only message from <code>tar</code> did not contain an error message mean that no errors occured and that it is safe to delete the original files?</p>