title: change default postgresql.conf location on ubuntu
body: <p>I can't seem to find a way to change the default location of <code>postgresql.conf</code> file from <code>/etc/postgresql/14/main/postgresql.conf</code> to <code>my/own/location/postgresql.conf</code>.
  I am running postgresql on Ubuntu server.
  I tried changing it using the postgres command line as per the docs but it gives the following error:</p>
  <pre><code>postgres=# ALTER SYSTEM SET config_file='/my/loc/test/postgresql/14/main/postgresql.conf';
  ERROR:  parameter &quot;config_file&quot; cannot be changed
  </code></pre>
  <p>any ideas?</p>