diff --git a/01.stress_script/inband_ac_cycle.sh b/01.stress_script/inband_ac_cycle.sh
index 447012d..24ca0e7 100644
--- a/01.stress_script/inband_ac_cycle.sh
+++ b/01.stress_script/inband_ac_cycle.sh
@@ -36,11 +36,11 @@ pre_check(){
     if [ -f $LOCAL_CNT_FILE ];then
         echo "Local cnt file exist ..." >> /dev/null
     else
-        echo "Local cnt file doesn't exist, so creat it ..." | tee $LOG_FILE
+        echo "Local cnt file doesn't exist, so creat it ..."
         echo 1 > $LOCAL_CNT_FILE
     fi
 
-    echo "---------------------------------------------" | tee $LOG_FILE
+    echo "---------------------------------------------"
 
     #Todo if need check something
     
@@ -51,7 +51,7 @@ start_ac_cycle(){
     local_cnt=`cat $LOCAL_CNT_FILE`
 
     if [ $local_cnt -le $aim_cnt ];then
-        echo "Index $local_cnt : will execute machine AC cycle" | tee $LOG_FILE
+        echo "Index $local_cnt : will execute machine AC cycle"
 
         local_cnt=$(($local_cnt+1))
         echo $local_cnt > $LOCAL_CNT_FILE
diff --git a/01.stress_script/inband_dc_cycle.sh b/01.stress_script/inband_dc_cycle.sh
index c58b839..0d86c95 100644
--- a/01.stress_script/inband_dc_cycle.sh
+++ b/01.stress_script/inband_dc_cycle.sh
@@ -36,11 +36,11 @@ pre_check(){
     if [ -f $LOCAL_CNT_FILE ];then
         echo "Local cnt file exist ..." >> /dev/null
     else
-        echo "Local cnt file doesn't exist, so creat it ..." | tee $LOG_FILE
+        echo "Local cnt file doesn't exist, so creat it ..."
         echo 1 > $LOCAL_CNT_FILE
     fi
 
-    echo "---------------------------------------------" | tee $LOG_FILE
+    echo "---------------------------------------------"
 
     #Todo if need check something
     
@@ -51,7 +51,7 @@ start_dc_cycle(){
     local_cnt=`cat $LOCAL_CNT_FILE`
 
     if [ $local_cnt -le $aim_cnt ];then
-        echo "Index $local_cnt : will execute power cycle" | tee $LOG_FILE
+        echo "Index $local_cnt : will execute power cycle"
 
         local_cnt=$(($local_cnt+1))
         echo $local_cnt > $LOCAL_CNT_FILE
diff --git a/01.stress_script/inband_stress_update.sh b/01.stress_script/inband_stress_update.sh
index de9e95b..01f5919 100644
--- a/01.stress_script/inband_stress_update.sh
+++ b/01.stress_script/inband_stress_update.sh
@@ -36,12 +36,12 @@ print_usage(){
 
 pre_check(){
     # check if local cnt file exist
-    echo "---------------------------------------------" | tee $LOG_FILE
+    echo "---------------------------------------------"
 
     #Todo if need check something
-    ipmitool mc info | tee $LOG_FILE
+    ipmitool mc info
     if [ $? -ne 0 ];then
-        echo ">>> BMC Die, script terminated ..." | tee $LOG_FILE
+        echo ">>> BMC Die, script terminated ..."
         exit 0
     fi
 }
@@ -52,7 +52,7 @@ start_stress_update(){
     while true
     do
         cnt=$(($cnt+1))
-        echo ">>> start test index $cnt" | tee $LOG_FILE
+        echo ">>> start test index $cnt"
 
         pre_check
 
@@ -62,16 +62,16 @@ start_stress_update(){
         else
             use_image=$image1
         fi
-        echo ">>> Use Image : $use_image" | tee $LOG_FILE
+        echo ">>> Use Image : $use_image"
 
         # start update
-        $YAFU -cd $use_image -pc | tee $LOG_FILE
-        echo ">>> End of update , start sleep 600s ..." | tee $LOG_FILE
+        $YAFU -cd $use_image -pc
+        echo ">>> End of update , start sleep 600s ..."
 
         if [ $cnt -le $aim_cnt ];then
             sleep $sleep_time
         else
-            echo ">>> Complete stress update, Exit ..." | tee $LOG_FILE
+            echo ">>> Complete stress update, Exit ..."
             break
         fi
     done
diff --git a/01.stress_script/os_reboot.sh b/01.stress_script/os_reboot.sh
index 43bec56..f1e86b0 100644
--- a/01.stress_script/os_reboot.sh
+++ b/01.stress_script/os_reboot.sh
@@ -36,11 +36,11 @@ pre_check(){
     if [ -f $LOCAL_CNT_FILE ];then
         echo "Local cnt file exist ..." >> /dev/null
     else
-        echo "Local cnt file doesn't exist, so creat it ..." | tee $LOG_FILE
+        echo "Local cnt file doesn't exist, so creat it ..."
         echo 1 > $LOCAL_CNT_FILE
     fi
 
-    echo "---------------------------------------------" | tee $LOG_FILE
+    echo "---------------------------------------------"
 
     #Todo if need check something
     
@@ -51,7 +51,7 @@ start_os_reboot(){
     local_cnt=`cat $LOCAL_CNT_FILE`
 
     if [ $local_cnt -le $aim_cnt ];then
-        echo "Index $local_cnt : will execute reboot" | tee $LOG_FILE
+        echo "Index $local_cnt : will execute reboot"
 
         sleep 1
 
diff --git a/01.stress_script/outband_ac_cycle.sh b/01.stress_script/outband_ac_cycle.sh
index a55f058..307e142 100644
--- a/01.stress_script/outband_ac_cycle.sh
+++ b/01.stress_script/outband_ac_cycle.sh
@@ -34,7 +34,7 @@ print_usage(){
 # }
 
 pre_check(){
-    echo "---------------------------------------------" | tee $LOG_FILE
+    echo "---------------------------------------------"
 
     #Todo if need check something
     
@@ -48,16 +48,16 @@ start_ac_cycle(){
         cnt=$(($cnt+1))
         pre_check
 
-        echo ">>> start test index $cnt, will perform AC cycle" | tee $LOG_FILE
+        echo ">>> start test index $cnt, will perform AC cycle"
 
-        ipmitool -I lanplus -H $bmcip -U $username -P $password raw 0x3c 0x28 0xff 0xfc | tee $LOG_FILE
+        ipmitool -I lanplus -H $bmcip -U $username -P $password raw 0x3c 0x28 0xff 0xfc
         sleep 10
-        ipmitool -I lanplus -H $bmcip -U $username -P $password raw 0x3c 0x28 0xff 0xfd | tee $LOG_FILE
+        ipmitool -I lanplus -H $bmcip -U $username -P $password raw 0x3c 0x28 0xff 0xfd
 
         if [ $cnt -le $aim_cnt ];then
             sleep 180
         else
-            echo ">>> Complete test , will exit ..." | tee $LOG_FILE
+            echo ">>> Complete test , will exit ..."
             break;
         fi
 
diff --git a/01.stress_script/outband_dc_cycle.sh b/01.stress_script/outband_dc_cycle.sh
index a0e517d..15be37f 100644
--- a/01.stress_script/outband_dc_cycle.sh
+++ b/01.stress_script/outband_dc_cycle.sh
@@ -34,7 +34,7 @@ print_usage(){
 # }
 
 pre_check(){
-    echo "---------------------------------------------" | tee $LOG_FILE
+    echo "---------------------------------------------"
 
     #Todo if need check something
     
@@ -48,14 +48,14 @@ start_dc_cycle(){
         cnt=$(($cnt+1))
         pre_check
 
-        echo ">>> start test index $cnt, will perform power cycle" | tee $LOG_FILE
+        echo ">>> start test index $cnt, will perform power cycle"
 
-        ipmitool -I lanplus -H $bmcip -U $username -P $password power cycle | tee $LOG_FILE
+        ipmitool -I lanplus -H $bmcip -U $username -P $password power cycle
 
         if [ $cnt -le $aim_cnt ];then
             sleep 120
         else
-            echo ">>> Complete test , will exit ..." | tee $LOG_FILE
+            echo ">>> Complete test , will exit ..."
             break;
         fi