diff --git a/xCAT/postscripts/updateflag.awk b/xCAT/postscripts/updateflag.awk
index 0eeb343b4..850899761 100755
--- a/xCAT/postscripts/updateflag.awk
+++ b/xCAT/postscripts/updateflag.awk
@@ -1,4 +1,4 @@
-#!/bin/awk -f
+#!/usr/bin/awk -f
 # IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
 
 BEGIN {
diff --git a/xCAT/postscripts/xcatinstallpost b/xCAT/postscripts/xcatinstallpost
index 054b4b01a..beb768e31 100755
--- a/xCAT/postscripts/xcatinstallpost
+++ b/xCAT/postscripts/xcatinstallpost
@@ -5,13 +5,13 @@
 #   xCAT script for running postboot scripts for full install case.
 #################################################################
 
-if [ ! `uname` == Linux ]; then
+if [ ! `uname` = Linux ]; then
    MYDIR=`dirname $0`
    #exec $MYDIR/xcatdsklspost.aix
    logger -t xcat "$0: the OS name is not Linux"
    exit
 fi
-let SLI=$RANDOM%10
+SLI=$(awk 'BEGIN{srand(); printf("%d\n",rand()*10)}')
 sleep $SLI
 
 cd /xcatpost;