diff --git a/xCAT-nbroot/overlay/etc/init.d/S10autodetect b/xCAT-nbroot/overlay/etc/init.d/S10autodetect
index 1e5041466..3f0c14b1e 100755
--- a/xCAT-nbroot/overlay/etc/init.d/S10autodetect
+++ b/xCAT-nbroot/overlay/etc/init.d/S10autodetect
@@ -77,14 +77,14 @@ NEEDVETH=0;
 for dir in /proc/device-tree/vdevice/l-lan*; do
     if [ -d $dir ]; then NEEDVETH=1; fi
 done
-if [ $NEEDVETH ==  1 ]; then
+if [ $NEEDVETH =  1 ]; then
 	modprobe ibmveth
 fi
 NEEDEHEA=0;
 for dir in /proc/device-tree/lhea*; do
     if [ -d $dir ]; then NEEDEHEA=1; fi
 done
-if [ $NEEDEHEA == 1 ]; then
+if [ $NEEDEHEA = 1 ]; then
 		    modprobe ehea
 fi
 
@@ -96,10 +96,10 @@ done
 
 
 
-let extrat=0
-until [ $extrat == 80 -o -z "$NICSTOWAIT" ]; do
+((extrat=0))
+until [ $extrat = 80 -o -z "$NICSTOWAIT" ]; do
    sleep 1
-   let extrat=extrat+1
+   ((extrat=extrat+1))
    for nic in $NICSTOWAIT; do 
       if ifconfig $nic|grep "inet addr"; then
          NICSTOWAIT=`echo $NICSTOWAIT|sed -e s/$nic//`
@@ -107,7 +107,7 @@ until [ $extrat == 80 -o -z "$NICSTOWAIT" ]; do
             echo "Warning: $nic took more than 45 seconds to receive DHCP reply, spanning-tree may not be configured well, examine switch configuration" >> /etc/motd
             echo "Warning: $nic took more than 45 seconds to receive DHCP reply, spanning-tree may not be configured well, examine switch configuration"
          fi
-      elif [ $extrat == 15 ]; then
+      elif [ $extrat = 15 ]; then
             if ethtool $nic | grep "Link detected: no"; then
                echo "$nic did not have any link when bringing up network"
                echo "$nic did not have any link when bringing up network" >> /etc/motd
diff --git a/xCAT-nbroot/overlay/etc/init.d/S11stunnel b/xCAT-nbroot/overlay/etc/init.d/S11stunnel
index 23b1b5fee..5f003a462 100755
--- a/xCAT-nbroot/overlay/etc/init.d/S11stunnel
+++ b/xCAT-nbroot/overlay/etc/init.d/S11stunnel
@@ -6,7 +6,7 @@ XCATPORT=3001
 killall stunnel > /dev/null 2>&1
 for parm in `cat /proc/cmdline`; do
 	key=`echo $parm|awk -F= '{print $1}'`
-	if [ "$key" == "xcatd" ]; then
+	if [ "$key" = "xcatd" ]; then
 		XCATDEST=`echo $parm|awk -F= '{print $2}'`
         XCATPORT=`echo $XCATDEST|awk -F: '{print $2}'`
 	fi
@@ -22,12 +22,12 @@ if [ ! -z "$XCATDEST" ]; then
    echo 'connect='$XCATDEST >> /etc/stunnel/stunnel.conf
 fi
 if [ -r /tmp/dhcpserver ]; then 
-   let i=400;
+   ((i=400));
    for srv in `cat /tmp/dhcpserver`; do
     echo "[xcatd$i]" >> /etc/stunnel/stunnel.conf
     echo "accept=127.0.0.1:$i" >> /etc/stunnel/stunnel.conf
     echo "connect="$srv":"$XCATPORT >> /etc/stunnel/stunnel.conf
-    let i=i+1
+    ((i=i+1))
    done
 fi
 mkdir -p /usr/var/run/stunnel