diff --git a/xCAT-server/share/xcat/install/scripts/post.debian b/xCAT-server/share/xcat/install/scripts/post.debian
index c6e0c42ca..13c45fc78 100644
--- a/xCAT-server/share/xcat/install/scripts/post.debian
+++ b/xCAT-server/share/xcat/install/scripts/post.debian
@@ -89,7 +89,7 @@ do
                 mkdir -p /opt/xcat
                 touch /opt/xcat/xcatinfo
             fi
-            grep 'XCATSERVER' /opt/xcat/xcatinfo 2>&1 > /dev/null
+            grep 'XCATSERVER' /opt/xcat/xcatinfo > /dev/null 2>&1
             if [ $? -eq 0 ]; then
                 sed -i "s/XCATSERVER=.*/XCATSERVER=$i/" /opt/xcat/xcatinfo
             else
diff --git a/xCAT-server/share/xcat/install/scripts/post.xcat b/xCAT-server/share/xcat/install/scripts/post.xcat
index 0c26973b1..7303b00df 100755
--- a/xCAT-server/share/xcat/install/scripts/post.xcat
+++ b/xCAT-server/share/xcat/install/scripts/post.xcat
@@ -48,14 +48,14 @@ if [ ! -f /opt/xcat/xcatinfo ]; then
     touch /opt/xcat/xcatinfo
 fi
 
-grep 'XCATSERVER' /opt/xcat/xcatinfo 2>&1 > /dev/null
+grep 'XCATSERVER' /opt/xcat/xcatinfo > /dev/null 2>&1
 if [ $? -eq 0 ]; then
     sed -i "s/XCATSERVER=.*/XCATSERVER=$MASTER_IP/" /opt/xcat/xcatinfo
 else
     echo "XCATSERVER=$MASTER_IP" >> /opt/xcat/xcatinfo
 fi
 
-grep 'INSTALLDIR' /opt/xcat/xcatinfo 2>&1 > /dev/null
+grep 'INSTALLDIR' /opt/xcat/xcatinfo > /dev/null 2>&1
 if [ $? -eq 0 ]; then
     sed -i "s/INSTALLDIR=.*/INSTALLDIR=$INSTALLDIR/" /opt/xcat/xcatinfo
 else
diff --git a/xCAT/postscripts/xcatdsklspost b/xCAT/postscripts/xcatdsklspost
index 28489c947..dfebd6565 100755
--- a/xCAT/postscripts/xcatdsklspost
+++ b/xCAT/postscripts/xcatdsklspost
@@ -322,7 +322,7 @@ if [ "$MODE" = "4" ]; then # for statelite mode
         if [ "$KEY" =  "XCAT" ]; then
             TMP=`echo $i | awk -F= '{print $2}'`
             XCATSERVER=`echo $TMP | cut -d: -f1`
-            grep 'XCATSERVER' /opt/xcat/xcatinfo 2>&1 > /dev/null
+            grep 'XCATSERVER' /opt/xcat/xcatinfo > /dev/null  2>&1
             if [ $? -eq 0 ]; then
                 sed -i "s/XCATSERVER=.*/XCATSERVER=$XCATSERVER/" /opt/xcat/xcatinfo
             else
@@ -365,7 +365,7 @@ else # for common mode  MODE=1,2,3,5 (updatenode,moncfg,node deployment)
             break
         fi
      done
-     grep 'NODE' /opt/xcat/xcatinfo 2>&1 > /dev/null
+     grep 'NODE' /opt/xcat/xcatinfo > /dev/null  2>&1
      if [ $? -eq 0 ]; then
         sed -i "s/NODE=.*/NODE=$NODE/" /opt/xcat/xcatinfo
      else
@@ -639,7 +639,7 @@ if [ -n "$new_ms" ]; then
 	mkdir -p /opt/xcat
 	touch /opt/xcat/xcatinfo
     fi
-    grep 'XCATSERVER' /opt/xcat/xcatinfo 2>&1 > /dev/null
+    grep 'XCATSERVER' /opt/xcat/xcatinfo > /dev/null  2>&1
     if [ $? -eq 0 ]; then
 	sed -i "s/XCATSERVER=.*/XCATSERVER=$new_ms/" /opt/xcat/xcatinfo
     else
@@ -663,7 +663,7 @@ if [ -n "$useflowcontrol" ]; then
     else 
        new_fc="NO"
     fi
-    grep 'USEFLOWCONTROL' /opt/xcat/xcatinfo 2>&1 > /dev/null
+    grep 'USEFLOWCONTROL' /opt/xcat/xcatinfo > /dev/null  2>&1
     if [ $? -eq 0 ]; then
 	sed -i "s/USEFLOWCONTROL=.*/USEFLOWCONTROL=$new_fc/" /opt/xcat/xcatinfo
     else
@@ -687,7 +687,7 @@ if [ "$MODE" = "1" ] || [ "$MODE" = "2" ]; then
 	mkdir -p /opt/xcat
 	touch /opt/xcat/xcatinfo
   fi
-  grep 'NODE' /opt/xcat/xcatinfo 2>&1 > /dev/null
+  grep 'NODE' /opt/xcat/xcatinfo > /dev/null  2>&1
   if [ $? -eq 0 ]; then
 	sed -i "s/NODE=.*/NODE=$NODE/" /opt/xcat/xcatinfo
   else
diff --git a/xCAT/postscripts/xcatinstallpost b/xCAT/postscripts/xcatinstallpost
index 48d495042..72ce250d5 100755
--- a/xCAT/postscripts/xcatinstallpost
+++ b/xCAT/postscripts/xcatinstallpost
@@ -75,7 +75,7 @@ DHCP_TMP=`sed 's/\(DHCPINTERFACES=\)\(.*\)$/\1"\2"/' /xcatpost/mypostscript.post
 echo "$DHCP_TMP" > /xcatpost/mypostscript.post
 
 #mark that the first reboot after installation is finished
-grep 'REBOOT' /opt/xcat/xcatinfo 2>&1 > /dev/null
+grep 'REBOOT' /opt/xcat/xcatinfo > /dev/null 2>&1 
 if [ $? -eq 0 ]; then
     sed -i "s/REBOOT=.*/REBOOT=TRUE/" /opt/xcat/xcatinfo
 else