Use global ssh_known_hosts file

control/control

@@ -12,9 +12,9 @@ buildCluster()
     mkdir -p "${HOME}/.ssh"
     sed -i -e "s/\$NODE_ADDRESS/${ip}/" "$clusterConfigFile"
     {
-        echo "# Inserted by OAS control"
+        echo "# Inserted for OpenAppStack control"
         ssh-keyscan -H "$ip" 2> /dev/null
-    } >> "${HOME}/.ssh/known_hosts"
+    } >> "/etc/ssh/ssh_known_hosts"
     rke up --config="$clusterConfigFile" || exit
     mkdir -p "/control/local/kube"
     cp "/control/config/kube_config_cluster.yml" "/control/local/kube/config"