add ldap-hostname script and service

usr/bin/ldap-hostname

@@ -0,0 +1,11 @@
+#!/bin/sh
+
+IP=$(hostname -I | awk '{print $1}')
+HOSTNAME=$(getent hosts | grep $IP | awk '{print $2}')
+
+if [ -n "$HOSTNAME" ]; then
+    hostnamectl set-hostname "$HOSTNAME"
+    echo "Hostname set to $HOSTNAME"
+else
+    echo "Hostname not found for IP $IP"
+fi