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diff --git a/jenkins/system/delete_old_containers.sh b/jenkins/system/delete_old_containers.sh
new file mode 100755
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+++ b/jenkins/system/delete_old_containers.sh
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+#!/bin/bash
+#   Copyright 2017 Sandvine
+#
+#   Licensed under the Apache License, Version 2.0 (the "License");
+#   you may not use this file except in compliance with the License.
+#   You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS,
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#   See the License for the specific language governing permissions and
+#   limitations under the License.
+#
+# A helper routine that cleans up old container images based
+# on an input prefix to check. Jenkins builds will add an incrementing
+# build suffix  (build number) to the prefix
+#
+#$1 container prefix name
+
+keep_number=1
+prefix=$1
+
+# keep the first build
+keep=$(lxc list | grep $prefix | awk '{print $2}' | sort -rn | head -n$keep_number)
+for container in $(lxc list | grep $prefix | awk '{print $2}' | sort -rn); do
+    if [ "$container" != "$keep" ]; then
+        echo "deleting old container $container"
+        lxc delete $container --force
+    fi
+done