title: ASP.NET Core Environment variable colon in Linux
body: <p>In ASP.NET Core nested configuration via environment variables is typically done via colon syntax:</p>
  
  <p><code>MySettings:SomeSetting=MyNewValue</code></p>
  
  <p>How do you do this in Linux? The <code>export</code> command rejects the colon? 
  eg:</p>
  
  <p><code>export MySettings:SomeSetting=MyNewValue</code></p>
  
  <p>Errors with </p>
  
  <pre><code>bash: export: `MySettings:SomeSetting=MyNewValue': not a valid identifier
  </code></pre>