Add Reload The nginx Configuration as a devops til.

devops/reload-the-nginx-configuration.md

@@ -0,0 +1,17 @@
+# Reload The nginx Configuration
+
+The nginx service won't immediately start using a modified or replaced nginx
+configuration. Once a `restart` or `reload` signal is received by nginx, it
+will apply the changes. The `reload` signal
+
+```
+$ service nginx reload
+```
+
+tells nginx to reload the configuration. It will check the validity of the
+configuration file and then spawn new worker processes for the latest
+configuration. It then sends requests to shut down the old worker processes.
+This means that during a *reload* nginx is always up and processing
+requests.
+
+[source](http://nginx.org/en/docs/beginners_guide.html)