diff --git a/_common/functions.sh b/_common/functions.sh
new file mode 100644
index 0000000..6d3a931
--- /dev/null
+++ b/_common/functions.sh
@@ -0,0 +1,9 @@
+#!/bin/bash
+
+pushd () {
+    command pushd "$@" > /dev/null
+}
+
+popd () {
+    command popd "$@" > /dev/null
+}
diff --git a/cluster/start.sh b/cluster/start.sh
index 0009d19..00b9a1b 100755
--- a/cluster/start.sh
+++ b/cluster/start.sh
@@ -13,6 +13,8 @@ COMPOSE_FILE_COMMAND+=("--project-name" "$PROJECT")
 # Where is this script? It could be called from anywhere, so use this to get full paths.
 SCRIPTPATH="$( cd "$(dirname "$0")"; pwd -P )"
 
+source "$SCRIPTPATH/../_common/functions.sh"
+
 while getopts n:h o; do
   case "$o" in
     n)
diff --git a/cluster_with_federation/start.sh b/cluster_with_federation/start.sh
index 0009d19..00b9a1b 100755
--- a/cluster_with_federation/start.sh
+++ b/cluster_with_federation/start.sh
@@ -13,6 +13,8 @@ COMPOSE_FILE_COMMAND+=("--project-name" "$PROJECT")
 # Where is this script? It could be called from anywhere, so use this to get full paths.
 SCRIPTPATH="$( cd "$(dirname "$0")"; pwd -P )"
 
+source "$SCRIPTPATH/../_common/functions.sh"
+
 while getopts n:h o; do
   case "$o" in
     n)
diff --git a/federation/start.sh b/federation/start.sh
index c616a88..d1d0b1a 100755
--- a/federation/start.sh
+++ b/federation/start.sh
@@ -13,6 +13,8 @@ COMPOSE_FILE_COMMAND+=("--project-name" "$PROJECT")
 # Where is this script? It could be called from anywhere, so use this to get full paths.
 SCRIPTPATH="$( cd "$(dirname "$0")"; pwd -P )"
 
+source "$SCRIPTPATH/../_common/functions.sh"
+
 while getopts n:h o; do
   case "$o" in
     n)