title: unable to create new file '/var/lib/dpkg/arch-new'
body: <p>I've been trying to install steam on debian 9, I need to get the i386 architecture, but it doesn't let me do it</p>
  
  <pre><code>dpkg --print-architecture
  </code></pre>
  
  <p>returns 
  <code>amd64</code></p>
  
  <p>and when i use <code>dpkg --print-foreign-architectures</code> <br>
         it returns with <code>i386</code></p>
  
  <p>using <code>sudo dpkg --add-architecture i386</code> <br>
  returns me nothing but it also doesnt update even after <br></p>
  
  <pre><code>sudo apt-get update
  </code></pre>
  
  <p>without using sudo I get the following error</p>
  
  <pre><code>dpkg: error: unable to create new file '/var/lib/dpkg/arch-new': Permission denied
  </code></pre>
  
  <p>I can't seem to find a fix regarding my system</p>