diff --git a/xCAT-server/share/xcat/ib/scripts/Mellanox/mlnxofed_ib_install.v2 b/xCAT-server/share/xcat/ib/scripts/Mellanox/mlnxofed_ib_install.v2
index cc1970044..2ce203c78 100755
--- a/xCAT-server/share/xcat/ib/scripts/Mellanox/mlnxofed_ib_install.v2
+++ b/xCAT-server/share/xcat/ib/scripts/Mellanox/mlnxofed_ib_install.v2
@@ -218,11 +218,11 @@ function cleanup()
         i=0
         if mount | grep -q "$IMGROOTPATH/sys"; then
             while ! umount "$IMGROOTPATH/sys"
-            do 
+            do
                 (( ++i > max_retry )) && echo "Umount $IMGROOTPATH/sys failed" >&2 && break
                 sleep 1
             done
-        fi 
+        fi
         i=0
         if mount | grep -q "$IMGROOTPATH/proc"; then
             while ! umount "$IMGROOTPATH/proc"
@@ -230,7 +230,7 @@ function cleanup()
                 (( ++i > max_retry )) && echo "Umount $IMGROOTPATH/proc failed" >&2 && break
                 sleep 1
             done
-        fi 
+        fi
         i=0
         if mount | grep -q "$IMGROOTPATH/dev"; then
             while ! umount "$IMGROOTPATH/dev"
@@ -260,10 +260,10 @@ if [ "$OS" = "Linux" ]; then
                 echo "[Error] please make your $HOSTNAME has ability to access ports.ubuntu.com" >&2
                 exit 1
             fi
-            
+
 
             echo "get distro name form /etc/lsb-release ......"
-            source /etc/lsb-release >/dev/null 2>&1 
+            source /etc/lsb-release >/dev/null 2>&1
             if [ -z "$DISTRIB_CODENAME" ]; then
                 echo "[Error] can't get DISTRIB_CODENAME " >&2
                 exit 1
@@ -357,7 +357,7 @@ EOF
         mount --bind  /sys   "$IMGROOTPATH/sys/"
 
         hack_uname "${IMGROOTPATH}"
-             
+
         # Being called from <image>.postinstall script
         # Assume we are on the same machine
         if [ -f /etc/SuSE-release ]; then
@@ -377,9 +377,9 @@ EOF
 
             sourceslist="$IMGROOTPATH/etc/apt/sources.list"
             cp "$sourceslist" "${sourceslist}.bak"
-            
+
             echo "get distro name form $IMGROOTPATH/etc/lsb-release ......"
-            source $IMGROOTPATH/etc/lsb-release  >/dev/null 2>&1 
+            source $IMGROOTPATH/etc/lsb-release  >/dev/null 2>&1
             if [ -z "$DISTRIB_CODENAME" ]; then
                 echo "[Error] can't get DISTRIB_CODENAME " >&2
                 exit 1