ASP.NET Core Environment variable colon in Linux : <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>
