title: What text editor is available in Heroku bash shell?
body: <p>I'm trying to update httpd.conf in my Cedar-based Heroku app. I got to my Heroku bash with</p>
  
  <pre><code> heroku run bash
  </code></pre>
  
  <p>and found the conf dir under apache. But when I try to open any editor vi, vim, or emacs, I can't find any of these programs. How do you edit conf files on Heroku?</p>