title: How to confirm installations made in a docker container
body: <p>I've got a docker container and i'm trying to install python. I'm using <code>yum</code> for it:</p>
  
  <pre><code>yum install -y https://centos7.iuscommunity.org/ius-release.rpm
  </code></pre>
  
  <p>=> NOTE that I using CentOS-8. I found other install tutorials online but they were with <code>dnf</code> which I don't have.</p>
  
  <pre><code>yum update
  </code></pre>
  
  <p>=> this returns a screen where you get the all-known prompt: <code>Total download size: 24 M
  Is this ok [y/N]:</code>
  but docker doesn't let me type anything here, he quit automatically leaving <code>Operation aborted.</code> instead of <code>y</code> or <code>n</code>. How can i confirm my installation?</p>