title: In tar compressed file is there a way to add comment or description
body: <p>Is a way to add a comment or description in tar file?
  The idea is to add information without the need of extracting the whole archive - Something super fast, such as "This archive is for blah blah"
  For example:</p>
  
  <pre><code>tar --comment "This tar us for blah blah" -cjvf mytarfile.tar.bz2 directory_that_I_want_to_compress
  </code></pre>
  
  <p><strong>UPDATE</strong>
  I found what I want to do using zip and unzip instead. I can store my comment in a file within the zip archive and quickly retrieve that file without the need of extracting the whole archive. Fast.</p>
  
  <pre><code>zip -r my.zip my_dir
  unzip -p my.zip my_dir/mycomment.txt
  </code></pre>