diff --git a/cluster-mgmt/bin/known_hosts.sh b/cluster-mgmt/bin/known_hosts.sh
new file mode 100755
index 0000000..7113a8d
--- /dev/null
+++ b/cluster-mgmt/bin/known_hosts.sh
@@ -0,0 +1,4 @@
+#! /bin/bash
+. ${HOME}/bin/func.sh
+
+dsh -g ${basename} 'for i in `seq 1 25`; do ssh-keyscan 1.1.$i.1 >> ${HOME}/.ssh/known_hosts; done'