diff --git a/xCAT/postscripts/xcatpostinit1 b/xCAT/postscripts/xcatpostinit1
index e4966b677..2af370840 100755
--- a/xCAT/postscripts/xcatpostinit1
+++ b/xCAT/postscripts/xcatpostinit1
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
 # This script is deprecated, please use xcatpostinit1.install instead 
 # chkconfig: 345 84 59
diff --git a/xCAT/postscripts/xcatpostinit1.install b/xCAT/postscripts/xcatpostinit1.install
index fcbd7bbe9..6a42d5e15 100755
--- a/xCAT/postscripts/xcatpostinit1.install
+++ b/xCAT/postscripts/xcatpostinit1.install
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
 # chkconfig: 345 84 59
 # description: the hook for systemd service unit to run PB and report node status on diskful node 
diff --git a/xCAT/postscripts/xcatpostinit1.netboot b/xCAT/postscripts/xcatpostinit1.netboot
index eae32c188..099c0b725 100755
--- a/xCAT/postscripts/xcatpostinit1.netboot
+++ b/xCAT/postscripts/xcatpostinit1.netboot
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
 # chkconfig: 345 84 59
 # description: the hook in systemd service unit to run PB or report node status on  diskless & statelite node