diff --git a/scripts/update.sh b/scripts/update.sh
index 8df4e7b61..162d867cf 100755
--- a/scripts/update.sh
+++ b/scripts/update.sh
@@ -9,13 +9,18 @@ startTime=`date +%s`
 _os=`uname`
 echo "use system: ${_os}"
 
+if [ "$EUID" -ne 0 ]
+  then echo "Please run as root!"
+  exit
+fi
+
 if grep -Eqi "Ubuntu" /etc/issue || grep -Eq "Ubuntu" /etc/*-release; then
-	sudo ln -sf /bin/bash /bin/sh
+	ln -sf /bin/bash /bin/sh
 	#sudo dpkg-reconfigure dash
 fi
 
 if grep -Eqi "Debian" /etc/issue || grep -Eq "Debian" /etc/*-release; then
-	sudo ln -sf /bin/bash /bin/sh
+	ln -sf /bin/bash /bin/sh
 fi
 
 if [ ${_os} == "Darwin" ]; then
diff --git a/scripts/update_cn.sh b/scripts/update_cn.sh
index a5353fb1b..7e1799d5b 100755
--- a/scripts/update_cn.sh
+++ b/scripts/update_cn.sh
@@ -9,13 +9,18 @@ startTime=`date +%s`
 _os=`uname`
 echo "use system: ${_os}"
 
+if [ "$EUID" -ne 0 ]
+  then echo "Please run as root!"
+  exit
+fi
+
 if grep -Eqi "Ubuntu" /etc/issue || grep -Eq "Ubuntu" /etc/*-release; then
-	sudo ln -sf /bin/bash /bin/sh
+	ln -sf /bin/bash /bin/sh
 	#sudo dpkg-reconfigure dash
 fi
 
 if grep -Eqi "Debian" /etc/issue || grep -Eq "Debian" /etc/*-release; then
-	sudo ln -sf /bin/bash /bin/sh
+	ln -sf /bin/bash /bin/sh
 fi
 
 if [ ${_os} == "Darwin" ]; then
diff --git a/scripts/update_dev.sh b/scripts/update_dev.sh
index c3942ae88..e3866e542 100755
--- a/scripts/update_dev.sh
+++ b/scripts/update_dev.sh
@@ -9,13 +9,18 @@ startTime=`date +%s`
 _os=`uname`
 echo "use system: ${_os}"
 
+if [ "$EUID" -ne 0 ]
+  then echo "Please run as root!"
+  exit
+fi
+
 if grep -Eqi "Ubuntu" /etc/issue || grep -Eq "Ubuntu" /etc/*-release; then
-	sudo ln -sf /bin/bash /bin/sh
+	ln -sf /bin/bash /bin/sh
 	#sudo dpkg-reconfigure dash
 fi
 
 if grep -Eqi "Debian" /etc/issue || grep -Eq "Debian" /etc/*-release; then
-	sudo ln -sf /bin/bash /bin/sh
+	ln -sf /bin/bash /bin/sh
 fi
 
 if [ ${_os} == "Darwin" ]; then