diff --git a/tool_show_good_nodes.sh b/tool_show_good_nodes.sh
new file mode 100755
index 000000000..225555420
--- /dev/null
+++ b/tool_show_good_nodes.sh
@@ -0,0 +1,44 @@
+#/bin/bash 
+
+function join_by() { 
+	local IFS="$1"; shift; echo "$*"; 
+}
+
+cx4nodes=( isc17-c0{1..9} isc17-c{10..23} )
+node_list=$( join_by , "${cx4nodes[@]}" )
+
+
+IFS='' read -r -d '' script <<"EOF"
+if [ -d /esfs/jtacquaviva ]; then
+	cx4="$(lspci | grep ConnectX-4)"
+	if [[ "" != $cx4 ]]; then
+		echo 'ok'
+	else 
+		echo "no cx4"
+	fi
+else 
+	echo "/esfs/ is not mounted"
+fi
+EOF
+
+declare -a good_nodes
+for node in ${cx4nodes[@]}; do
+	#echo "ping $node"
+	status=$(ping -c1 $node | grep Unreachable)
+	if [[ "" == $status ]]; then
+		check=$(ssh $node "$script")
+		if [[ "ok" == ${check} ]]; then
+			good_nodes=( ${good_nodes[@]} $node )
+		else 
+			echo "$node failed with: $check"
+		fi
+	else 
+		echo "$node is unreachable"
+	fi
+done
+
+echo "GOOD NODES:"
+echo "${good_nodes[@]}"
+
+
+