Add pg_ctl page (#1835)

pages/common/pg_ctl.md

@@ -0,0 +1,19 @@
+# pg_ctl
+
+> Utility for controlling a PostgreSQL server and database cluster.
+
+- Start a PostgreSQL server:
+
+`pg_ctl -D {{data_directory}} -l {{log_file_name}}`
+
+- Initialize a PostgreSQL database cluster:
+
+`pg_ctl -D {{data_directory}} init`
+
+- Stop a PostgreSQL server:
+
+`pg_ctl -D {{data_directory}} stop`
+
+- Restart a PostgreSQL server:
+
+`pg_ctl -D {{data_directory}} restart`