diff --git a/scripts/install.sh b/scripts/install.sh
index f7de91cea..36ec445cc 100755
--- a/scripts/install.sh
+++ b/scripts/install.sh
@@ -78,8 +78,9 @@ echo "use system version: ${OSNAME}"
 curl -fsSL  https://raw.githubusercontent.com/midoks/mdserver-web/master/scripts/install/${OSNAME}.sh | bash
 
 chmod +x /www/server/mdserver-web/mw-cli
-ln -s /www/server/mdserver-web/mw-cli /usr/bin/mw-cli
-
+if [ ! -e /usr/bin/mw-cli ]; then 
+	ln -s /www/server/mdserver-web/mw-cli /usr/bin/mw-cli
+fi
 endTime=`date +%s`
 ((outTime=(${endTime}-${startTime})/60))
 echo -e "Time consumed:\033[32m $outTime \033[0mMinute!"
diff --git a/scripts/install_cn.sh b/scripts/install_cn.sh
index df14387ad..0aae76440 100755
--- a/scripts/install_cn.sh
+++ b/scripts/install_cn.sh
@@ -78,7 +78,9 @@ echo "use system version: ${OSNAME}"
 curl -fsSL  https://gitee.com/midoks/mdserver-web/raw/master/scripts/install/${OSNAME}.sh | bash
 
 chmod +x /www/server/mdserver-web/mw-cli
-ln -s /www/server/mdserver-web/mw-cli /usr/bin/mw-cli
+if [ ! -e /usr/bin/mw-cli ]; then 
+	ln -s /www/server/mdserver-web/mw-cli /usr/bin/mw-cli
+fi
 
 endTime=`date +%s`
 ((outTime=(${endTime}-${startTime})/60))
diff --git a/scripts/install_dev.sh b/scripts/install_dev.sh
index bc0d1a8ca..9fb93b7c2 100755
--- a/scripts/install_dev.sh
+++ b/scripts/install_dev.sh
@@ -77,7 +77,9 @@ echo "use system version: ${OSNAME}"
 curl -fsSL https://raw.githubusercontent.com/midoks/mdserver-web/dev/scripts/install/${OSNAME}.sh | bash
 
 chmod +x /www/server/mdserver-web/mw-cli
-ln -s /www/server/mdserver-web/mw-cli /usr/bin/mw-cli
+if [ ! -e /usr/bin/mw-cli ]; then 
+	ln -s /www/server/mdserver-web/mw-cli /usr/bin/mw-cli
+fi
 
 endTime=`date +%s`
 ((outTime=(${endTime}-${startTime})/60))