diff --git a/apm-backend-dist/bin/startup.sh b/apm-backend-dist/bin/startup.sh
index 57d0c76d71a0e318594a4f66bc7164798998af9f..875c450de7fe66730f693b24b5d73ef867fb5606 100644
--- a/apm-backend-dist/bin/startup.sh
+++ b/apm-backend-dist/bin/startup.sh
@@ -7,4 +7,4 @@ WEBAPP_EXE=webappService.sh
 
 exec "$PRGDIR"/"$COLLECTOR_EXE" start
 
-exec "$PRGDIR"/"$COLLECTOR_EXE" start
+exec "$PRGDIR"/"$WEBAPP_EXE" start
diff --git a/apm-backend-dist/bin/webappService.sh b/apm-backend-dist/bin/webappService.sh
index 9c51fb9f3eec4cbaa6330ae7598f7cc4304cc79a..d36779a201d4df041f59f7dfd94d011b0fc447de 100644
--- a/apm-backend-dist/bin/webappService.sh
+++ b/apm-backend-dist/bin/webappService.sh
@@ -1,27 +1,27 @@
-#!/usr/bin/env sh
-
-PRG="$0"
-PRGDIR=`dirname "$PRG"`
-[ -z "$WEBAPP_HOME" ] && $WEBAPP_HOME=`cd "$PRGDIR/.." >/dev/null; pwd`
-
-WEBAPP_LOG_DIR="${$WEBAPP_HOME}/logs"
-JAVA_OPTS=" -Xms256M -Xmx512M"
-JAR_PATH="${$WEBAPP_HOME}/webapp"
-
-if [ ! -d "${$WEBAPP_HOME}/logs" ]; then
-    mkdir -p "${WEBAPP_LOG_DIR}"
-fi
-
-_RUNJAVA=${JAVA_HOME}/bin/java
-[ -z "$JAVA_HOME" ] && _RUNJAVA=java
-
-eval exec "\"$_RUNJAVA\" ${JAVA_OPTS} -jar ${JAR_PATH}/skywalking-webapp.jar \
-        2>${WEBAPP_LOG_DIR}/webapp.log 1> /dev/null &"
-
-if [ $? -eq 0 ]; then
-    sleep 1
-	echo "Skywalking Web Application started successfully!"
-else
-	echo "Skywalking Web Application started failure!"
-	exit 1
-fi
+#!/usr/bin/env sh
+
+PRG="$0"
+PRGDIR=`dirname "$PRG"`
+[ -z "$WEBAPP_HOME" ] && $WEBAPP_HOME=`cd "$PRGDIR/.." >/dev/null; pwd`
+
+WEBAPP_LOG_DIR="${WEBAPP_HOME}/logs"
+JAVA_OPTS=" -Xms256M -Xmx512M"
+JAR_PATH="${WEBAPP_HOME}/webapp"
+
+if [ ! -d "${WEBAPP_HOME}/logs" ]; then
+    mkdir -p "${WEBAPP_LOG_DIR}"
+fi
+
+_RUNJAVA=${JAVA_HOME}/bin/java
+[ -z "$JAVA_HOME" ] && _RUNJAVA=java
+
+eval exec "\"$_RUNJAVA\" ${JAVA_OPTS} -jar ${JAR_PATH}/skywalking-webapp.jar \
+        2>${WEBAPP_LOG_DIR}/webapp.log 1> /dev/null &"
+
+if [ $? -eq 0 ]; then
+    sleep 1
+	echo "Skywalking Web Application started successfully!"
+else
+	echo "Skywalking Web Application started failure!"
+	exit 1
+fi