title: Set systemd journalctl to ignore process
body: <p>My <code>journalctl</code> is littered with <code>gnome-session</code> warnings. I've tracked down the issue to Google Chrome, and the warning is relatively harmless. However, it's flooded my journal output, and frankly I won't be able to find what I need if I do need to check it.</p>
  
  <p><code>May 30 12:13:49 hostname gnome-session[1347]: Window manager warning: meta_window_activate called by a pager with a 0 timestamp; the pager needs to be fixed.</code></p>
  
  <p>Frankly, it's a Chrome issue and I'll leave it at that. But is there a way to make the <code>journalctl</code> command suppress output from a certain process? I'd like to just disable <code>gnome-session</code> logging altogether.</p>