diff --git a/elements/base/install.d/99-dkms b/elements/base/install.d/99-dkms
index 56e8e1601..44b2d4ce0 100755
--- a/elements/base/install.d/99-dkms
+++ b/elements/base/install.d/99-dkms
@@ -1,2 +1,2 @@
-#!/bin/sh
+#!/bin/bash
 install-packages dkms
diff --git a/elements/cache-url/bin/cache-url b/elements/cache-url/bin/cache-url
index e1f953669..312cbe5ed 100755
--- a/elements/cache-url/bin/cache-url
+++ b/elements/cache-url/bin/cache-url
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 # Copyright 2012 Hewlett-Packard Development Company, L.P.
 # All Rights Reserved.
diff --git a/elements/config-applier/install.d/20-config-applier b/elements/config-applier/install.d/20-config-applier
index c7e863df6..1b153fcf9 100755
--- a/elements/config-applier/install.d/20-config-applier
+++ b/elements/config-applier/install.d/20-config-applier
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 home=$(dirname $0)
 set -uex
diff --git a/elements/deploy-kexec/install.d/53-install-kexec b/elements/deploy-kexec/install.d/53-install-kexec
index 19e430e53..1a26ff78a 100755
--- a/elements/deploy-kexec/install.d/53-install-kexec
+++ b/elements/deploy-kexec/install.d/53-install-kexec
@@ -1,2 +1,2 @@
-#!/bin/sh
+#!/bin/bash
 install-packages kexec-tools
diff --git a/elements/deploy/install.d/51-install-tgt b/elements/deploy/install.d/51-install-tgt
index dc17f90ab..9c36dcaeb 100755
--- a/elements/deploy/install.d/51-install-tgt
+++ b/elements/deploy/install.d/51-install-tgt
@@ -1,2 +1,2 @@
-#!/bin/sh
+#!/bin/bash
 install-packages tgt
diff --git a/elements/deploy/install.d/52-install-busybox b/elements/deploy/install.d/52-install-busybox
index 356188ae5..fdecb5dd3 100755
--- a/elements/deploy/install.d/52-install-busybox
+++ b/elements/deploy/install.d/52-install-busybox
@@ -1,2 +1,2 @@
-#!/bin/sh
+#!/bin/bash
 install-packages busybox
diff --git a/elements/dhcp-all-interfaces/install.d/50-dhcp-all-interfaces b/elements/dhcp-all-interfaces/install.d/50-dhcp-all-interfaces
index a9ef2afa9..89ddcea82 100755
--- a/elements/dhcp-all-interfaces/install.d/50-dhcp-all-interfaces
+++ b/elements/dhcp-all-interfaces/install.d/50-dhcp-all-interfaces
@@ -1,4 +1,6 @@
-#!/bin/sh -x
+#!/bin/bash
+
+set -x
 
 # Prepare the target system for regenerating /etc/network/interfaces
 # on its first boot.
diff --git a/elements/dkms/post-install.d/99-dkms b/elements/dkms/post-install.d/99-dkms
index 02ff606fe..1e3773a6b 100755
--- a/elements/dkms/post-install.d/99-dkms
+++ b/elements/dkms/post-install.d/99-dkms
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # Trigger a run of dkms for all the modules installed
 # to ensure we have valid modules build for all.
 
diff --git a/elements/dpkg/bin/install-packages b/elements/dpkg/bin/install-packages
index 35dc9d69d..d5ce2306f 100644
--- a/elements/dpkg/bin/install-packages
+++ b/elements/dpkg/bin/install-packages
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 # Copyright 2012 Hewlett-Packard Development Company, L.P.
 # All Rights Reserved.
diff --git a/elements/dpkg/pre-install.d/00-disable-apt-recommends b/elements/dpkg/pre-install.d/00-disable-apt-recommends
index 36c310cfa..8221e4422 100755
--- a/elements/dpkg/pre-install.d/00-disable-apt-recommends
+++ b/elements/dpkg/pre-install.d/00-disable-apt-recommends
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # Prevent apt from installing recommended packages
 
 dd of=/etc/apt/apt.conf.d/95disable-recommends << _EOF_
diff --git a/elements/dpkg/pre-install.d/01-install-bin b/elements/dpkg/pre-install.d/01-install-bin
index 555bc782b..651085e1a 100755
--- a/elements/dpkg/pre-install.d/01-install-bin
+++ b/elements/dpkg/pre-install.d/01-install-bin
@@ -1,3 +1,3 @@
-#!/bin/sh
+#!/bin/bash
 
 install -m 0755 -o root -g root $(dirname $0)/../bin/* /usr/local/bin
diff --git a/elements/dracut-network/install.d/11-patch-dracut b/elements/dracut-network/install.d/11-patch-dracut
index c15bd7efe..cee09c957 100755
--- a/elements/dracut-network/install.d/11-patch-dracut
+++ b/elements/dracut-network/install.d/11-patch-dracut
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 # If the patch doesn't apply just do nothing. This patch fixes a small
 # issue in the script that writes the network configuration files from
diff --git a/elements/fedora/bin/install-packages b/elements/fedora/bin/install-packages
index d353d2c9f..b2ea563c3 100644
--- a/elements/fedora/bin/install-packages
+++ b/elements/fedora/bin/install-packages
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 # Copyright 2012 Hewlett-Packard Development Company, L.P.
 # All Rights Reserved.
diff --git a/elements/ramdisk/cleanup.d/99-extract-ramdisk-files b/elements/ramdisk/cleanup.d/99-extract-ramdisk-files
index a1b258c05..aa6de6208 100755
--- a/elements/ramdisk/cleanup.d/99-extract-ramdisk-files
+++ b/elements/ramdisk/cleanup.d/99-extract-ramdisk-files
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 set -e
 set -x
diff --git a/elements/rhel/bin/install-packages b/elements/rhel/bin/install-packages
index d65b4c43f..f3f6548c9 100644
--- a/elements/rhel/bin/install-packages
+++ b/elements/rhel/bin/install-packages
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 #
 # 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
diff --git a/elements/rpm-distro/post-install.d/06-network-config-nonzeroconf b/elements/rpm-distro/post-install.d/06-network-config-nonzeroconf
index 5e3f2cedb..78e53e18b 100755
--- a/elements/rpm-distro/post-install.d/06-network-config-nonzeroconf
+++ b/elements/rpm-distro/post-install.d/06-network-config-nonzeroconf
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 # zeroconf should not be activated or it will add a 169.254.0.0
 # route. The route will interfere with access to the nova metadata
diff --git a/elements/rpm-distro/pre-install.d/01-install-bin b/elements/rpm-distro/pre-install.d/01-install-bin
index 555bc782b..651085e1a 100755
--- a/elements/rpm-distro/pre-install.d/01-install-bin
+++ b/elements/rpm-distro/pre-install.d/01-install-bin
@@ -1,3 +1,3 @@
-#!/bin/sh
+#!/bin/bash
 
 install -m 0755 -o root -g root $(dirname $0)/../bin/* /usr/local/bin
diff --git a/elements/rpm-distro/pre-install.d/01-override-yum-arch b/elements/rpm-distro/pre-install.d/01-override-yum-arch
index bf0c6ed84..0e4ca66f4 100755
--- a/elements/rpm-distro/pre-install.d/01-override-yum-arch
+++ b/elements/rpm-distro/pre-install.d/01-override-yum-arch
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 if [ "i386" = "$ARCH" ]; then
   basearch=i386
diff --git a/elements/selinux-permissive/install.d/11-selinux-permissive b/elements/selinux-permissive/install.d/11-selinux-permissive
index 40255cf2b..a08f9bb17 100755
--- a/elements/selinux-permissive/install.d/11-selinux-permissive
+++ b/elements/selinux-permissive/install.d/11-selinux-permissive
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 echo "SELINUX=permissive" > /etc/selinux/config
 echo "SELINUXTYPE=targeted" >> /etc/selinux/config
diff --git a/elements/serial-console/install.d/20-stty b/elements/serial-console/install.d/20-stty
index f8fa8e5fe..ca91e7df7 100755
--- a/elements/serial-console/install.d/20-stty
+++ b/elements/serial-console/install.d/20-stty
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 home=$(dirname $0)
 set -uex
diff --git a/elements/source-repositories/install.d/01-source-repositories b/elements/source-repositories/install.d/01-source-repositories
index 1f9740a88..4ef606a75 100755
--- a/elements/source-repositories/install.d/01-source-repositories
+++ b/elements/source-repositories/install.d/01-source-repositories
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 set -uex
 
diff --git a/elements/ubuntu/pre-install.d/00-remove-apt-xapian-index b/elements/ubuntu/pre-install.d/00-remove-apt-xapian-index
index f1c24647f..c785802b8 100755
--- a/elements/ubuntu/pre-install.d/00-remove-apt-xapian-index
+++ b/elements/ubuntu/pre-install.d/00-remove-apt-xapian-index
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # This package is broken and causes real issues on update:
 # https://bugs.launchpad.net/ubuntu/+source/apt-xapian-index/+bug/1227420
 apt-get --yes remove apt-xapian-index || :
diff --git a/elements/vm/finalise.d/52-force-text-mode-console b/elements/vm/finalise.d/52-force-text-mode-console
index ebc1a1363..a647e00df 100755
--- a/elements/vm/finalise.d/52-force-text-mode-console
+++ b/elements/vm/finalise.d/52-force-text-mode-console
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 set -e