diff --git a/_opensearch/configuration.md b/_opensearch/configuration.md
index d28767bf..53090806 100755
--- a/_opensearch/configuration.md
+++ b/_opensearch/configuration.md
@@ -65,6 +65,10 @@ PUT _cluster/settings
 
 You can find `opensearch.yml` in `/usr/share/opensearch/config/opensearch.yml` (Docker) or `/etc/opensearch/opensearch.yml` (most Linux distributions) on each node.
 
+You can edit the `OPENSEARCH_PATH_CONF=/etc/opensearch` to change the config directory location. This variable is sourced from `/etc/default/opensearch`(Debian package) and `/etc/sysconfig/opensearch`(RPM package).
+
+If you set your customized `OPENSEARCH_PATH_CONF` variable, be aware that other default environment variables will not be loaded.
+
 You don't mark settings in `opensearch.yml` as persistent or transient, and settings use the flat form:
 
 ```yml