title: How do I check where npm is installing packages?
body: <p>So this runs correctly:</p>
  
  <pre><code>npm install -g topojson
  </code></pre>
  
  <p>But then:</p>
  
  <pre><code>topojson
  -bash: topojson: command not found
  </code></pre>
  
  <p>How do I know where it's put topojson? <a href="https://stackoverflow.com/questions/32547441/how-to-know-where-npm-is-installing-its-binaries">Duplicate of this unanswered question</a>. </p>