diff --git a/my-gym b/my-gym
index 98ca2bb9..e63d6769 160000
--- a/my-gym
+++ b/my-gym
@@ -1 +1 @@
-Subproject commit 98ca2bb9d2fec0e9360deaa4e01eca0b60b05ac8
+Subproject commit e63d6769900f79dc9d99f42a82535d68f9a8c64a
diff --git a/mybin b/mybin
index 1eed5177..6ff495d3 160000
--- a/mybin
+++ b/mybin
@@ -1 +1 @@
-Subproject commit 1eed517783033688fd101bc5a89fce23e12207be
+Subproject commit 6ff495d357399b59453c4c80373c12f8b73fcf76
diff --git a/postgres/README.md b/postgres/README.md
index 97257392..a9c4d813 100644
--- a/postgres/README.md
+++ b/postgres/README.md
@@ -1,3 +1,12 @@
 Use docker.
 
 https://hackernoon.com/dont-install-postgres-docker-pull-postgres-bee20e200198
+
+# 2023-12-28
+
+https://askubuntu.com/questions/385416/pg-ctl-command-not-found-what-package-has-this-command
+
+sudo pg_ctlcluster 'cluster_version' 'cluster-name' 'action'
+    
+/etc/postgresql/<cluster-version>/<cluster-name>/start.conf
+