diff --git a/cluster/ubuntu/util.sh b/cluster/ubuntu/util.sh
index a2d41c5173..c605996d3c 100755
--- a/cluster/ubuntu/util.sh
+++ b/cluster/ubuntu/util.sh
@@ -424,15 +424,15 @@ function kube-down {
     {
       echo "Cleaning on node ${i#*@}"
       if [[ "${roles[${ii}]}" == "ai" || "${roles[${ii}]}" == "a" ]]; then
-        ssh -t $i 'pgrep etcd && sudo -p "[sudo] password to stop master: " service etcd stop && sudo rm -rf /infra*; 
+        ssh $SSH_OPTS -t $i 'pgrep etcd && sudo -p "[sudo] password to stop master: " service etcd stop && sudo rm -rf /infra*; 
           sudo rm -rf /opt/bin/etcd* /etc/init/etcd.conf /etc/init.d/etcd /etc/default/etcd'
       elif [[ "${roles[${ii}]}" == "i" ]]; then
-        ssh -t $i 'pgrep flanneld && sudo -p "[sudo] password to stop node: " service flanneld stop'
+        ssh $SSH_OPTS -t $i 'pgrep flanneld && sudo -p "[sudo] password to stop node: " service flanneld stop'
       else
         echo "unsupported role for ${i}"
       fi
       # Delete the files in order to generate a clean environment, so you can change each node's role at next deployment.
-      ssh -t $i 'sudo rm -f /opt/bin/kube* /opt/bin/flanneld;
+      ssh $SSH_OPTS -t $i 'sudo rm -f /opt/bin/kube* /opt/bin/flanneld;
       sudo rm -rf /etc/init/kube* /etc/init/flanneld.conf /etc/init.d/kube* /etc/init.d/flanneld;
       sudo rm -rf /etc/default/kube* /etc/default/flanneld; 
       sudo rm -rf ~/kube /var/lib/kubelet;
@@ -475,7 +475,7 @@ function push-master {
   for i in ${nodes}; do
     if [[ "${roles[${ii}]}" == "a" ]]; then
       echo "Cleaning master ${i#*@}"
-      ssh -t $i 'sudo -p "[sudo] stop the all process: " service etcd stop;
+      ssh $SSH_OPTS -t $i 'sudo -p "[sudo] stop the all process: " service etcd stop;
       sudo rm -rf /opt/bin/etcd* /etc/init/etcd.conf /etc/init.d/etcd /etc/default/etcd;
       sudo rm -f /opt/bin/kube* /opt/bin/flanneld;
       sudo rm -rf /etc/init/kube* /etc/init/flanneld.conf /etc/init.d/kube* /etc/init.d/flanneld;
@@ -484,7 +484,7 @@ function push-master {
       provision-master
     elif [[ "${roles[${ii}]}" == "ai" ]]; then 
       echo "Cleaning master ${i#*@}"
-      ssh -t $i 'sudo -p "[sudo] stop the all process: " service etcd stop;
+      ssh $SSH_OPTS -t $i 'sudo -p "[sudo] stop the all process: " service etcd stop;
       sudo rm -rf /opt/bin/etcd* /etc/init/etcd.conf /etc/init.d/etcd /etc/default/etcd;
       sudo rm -f /opt/bin/kube* /opt/bin/flanneld;
       sudo rm -rf /etc/init/kube* /etc/init/flanneld.conf /etc/init.d/kube* /etc/init.d/flanneld;
@@ -519,7 +519,7 @@ function push-node() {
   for i in ${nodes}; do
     if [[ "${roles[${ii}]}" == "i" && ${i#*@} == $node_ip ]]; then
       echo "Cleaning node ${i#*@}"
-      ssh -t $i 'sudo -p "[sudo] stop the all process: " service flanneld stop;
+      ssh $SSH_OPTS -t $i 'sudo -p "[sudo] stop the all process: " service flanneld stop;
       sudo rm -f /opt/bin/kube* /opt/bin/flanneld;
       sudo rm -rf /etc/init/kube* /etc/init/flanneld.conf /etc/init.d/kube* /etc/init.d/flanneld;
       sudo rm -rf /etc/default/kube* /etc/default/flanneld; 
@@ -562,15 +562,15 @@ function kube-push {
     {
       echo "Cleaning on node ${i#*@}"
       if [[ "${roles[${ii}]}" == "ai" || "${roles[${ii}]}" == "a" ]]; then
-        ssh -t $i 'pgrep etcd && sudo -p "[sudo] password to stop master: " service etcd stop; 
+        ssh $SSH_OPTS -t $i 'pgrep etcd && sudo -p "[sudo] password to stop master: " service etcd stop; 
         sudo rm -rf /opt/bin/etcd* /etc/init/etcd.conf /etc/init.d/etcd /etc/default/etcd' || true
       elif [[ "${roles[${ii}]}" == "i" ]]; then
-        ssh -t $i 'pgrep flanneld && sudo -p "[sudo] password to stop node: " service flanneld stop' || true
+        ssh $SSH_OPTS -t $i 'pgrep flanneld && sudo -p "[sudo] password to stop node: " service flanneld stop' || true
       else
         echo "unsupported role for ${i}"
       fi
 
-      ssh -t $i 'sudo rm -f /opt/bin/kube* /opt/bin/flanneld;
+      ssh $SSH_OPTS -t $i 'sudo rm -f /opt/bin/kube* /opt/bin/flanneld;
       sudo rm -rf /etc/init/kube* /etc/init/flanneld.conf /etc/init.d/kube* /etc/init.d/flanneld;
       sudo rm -rf /etc/default/kube* /etc/default/flanneld; 
       sudo rm -rf ~/kube' || true