diff --git a/xCAT/postscripts/configefi b/xCAT/postscripts/configefi
index 6067248ce..4db78507c 100644
--- a/xCAT/postscripts/configefi
+++ b/xCAT/postscripts/configefi
@@ -1,2 +1,45 @@
-echo "Setting Boot Manager for the next boot."
-efibootmgr -c -l \\EFI\\redhat\\grub.efi -L Linux
+if [ -d /sys/firmware/efi ]; then
+    echo "Setting Boot Manager for the next boot."
+    efibootmgr -c -l \\EFI\\redhat\\grub.efi -L Linux
+else
+    echo "run grub-install to configure the MBR."
+    if [ -e /etc/mtab ];then
+        mv /etc/mtab /etc/mtab.bak
+    fi
+    grep -v rootfs /proc/mounts > /etc/mtab
+    boot_device=''
+    if [ -f "/etc/systemconfig/systemconfig.conf" ];then
+        boot_device=`cat /etc/systemconfig/systemconfig.conf | grep BOOTDEV | awk '{print $3}'`
+    else
+        str_temp=`mount | awk '{print $1","$3}'`
+        for line in $str_temp
+        do
+            mp=`echo $line | awk -F, '{print $2}'`
+            if [ "$mp" = "/" ];then
+                boot_device=`echo $line | awk -F, '{print $1}' | sed -e 's/[0-9]*$//'`
+                break
+            fi
+        done
+    fi
+
+    if [ -n "$boot_device" ];then
+        echo "the boot device is $boot_device"
+    else
+        echo "Can not find the boot device, return error"
+        exit 1
+    fi
+    
+    #for sles10, should run grub-install with parameters
+    echo "grub-install --no-floppy --recheck $boot_device"
+    grub-install --no-floppy --recheck $boot_device
+    if [ $? -ne 0 ];then
+        #sles11, run grub install directly
+        grub-install
+    fi
+   
+    if [ -e /etc/mtab.bak ];then
+        mv -f /etc/mtab.bak /etc/mtab
+    else
+        rm -f /etc/mtab
+    fi
+fi
diff --git a/xCAT/postscripts/killsyslog b/xCAT/postscripts/killsyslog
index 47aa106b5..ba2395caa 100755
--- a/xCAT/postscripts/killsyslog
+++ b/xCAT/postscripts/killsyslog
@@ -1,7 +1,3 @@
-#!/bin/bash
-
-#only used in sysclone when the image os is sles
-
 if [ -f "/etc/SuSE-release" ];then
     str_out=`ps -ef | grep -v grep | grep syslog-ng`
     if [ $? -eq 0 ];then
diff --git a/xCAT/postscripts/updatenetwork b/xCAT/postscripts/updatenetwork
index 4e7e9355d..fc82ab64d 100644
--- a/xCAT/postscripts/updatenetwork
+++ b/xCAT/postscripts/updatenetwork
@@ -7,21 +7,21 @@ if [ -n "$rule_file" ];then
     rm -f $rule_file
 fi
 
-echo "Updating hostname to $HOSTNAME"
-sed -i "s/HOSTNAME=.*/HOSTNAME=$HOSTNAME/g" /etc/sysconfig/network
-
 hostname $HOSTNAME
 
 str_cfg_file=''
 if [ -d "/etc/sysconfig/network-scripts/" ];then
     #redhat
     str_cfg_file="/etc/sysconfig/network-scripts/ifcfg-$DEVICE"
+    sed -i "s/HOSTNAME=.*/HOSTNAME=$HOSTNAME/g" /etc/sysconfig/network
 elif [ -d "/etc/sysconfig/network/" ];then
     #suse
     str_cfg_file="/etc/sysconfig/network/ifcfg-$DEVICE"
+    echo "$HOSTNAME" > /etc/HOSTNAME
 else
     #ubuntu
     str_cfg_file="/etc/network/interfaces.d/$DEVICE"
+    echo "$HOSTNAME" > /etc/hostname
 fi
 
 echo "Old ifcfg-$DEVICE is:"