title: How to find files except given name?
body: <p>There is a directory containing the following files:</p>
  <pre><code>.
  ├── bla-bla-bla1.tar.7z
  ├── bla-bla-bla2.tar.7z
  ├── bla-bla-bla3.tar.7z
  └── _bla-bla-bla_foo.tar.7z
  </code></pre>
  <p>I need to <strong>find</strong> and <strong>delete</strong> all of the files that in the format of <code>*.7z</code> except <code>_*.7z</code></p>
  <p>I've tried:</p>
  <pre class="lang-sh prettyprint-override"><code>find /backups/ -name &quot;*.7z&quot; -type f -mtime +180 -delete
  </code></pre>
  <p>How I can do it?</p>