diff --git a/log-files-locations.md b/log-files-locations.md
index bc597fc..035e394 100644
--- a/log-files-locations.md
+++ b/log-files-locations.md
@@ -14,3 +14,9 @@
     <p>(CentOS, RedHat)</p>
     <p>ErrorLog "/var/log/httpd/tracks_error.log"</p>
     <p>CustomLog "/var/log/httpd/tracks_access.log"</p>
+<h2>MySQL</h2>
+<h2>Passenger</h2>
+<p>by default the Passenger log file is the global (not the per-vhost) Apache error log file. This is typically located in /var/log/apache2/error_log. You can find out the exact location of the Passenger error log by running</p>
+<blockquote>
+&gt;passenger-config --detect-apache2
+</blockquote>