diff --git a/tools/afterinstall.sh b/tools/afterinstall.sh
index afbce06..e91b461 100644
--- a/tools/afterinstall.sh
+++ b/tools/afterinstall.sh
@@ -2,6 +2,52 @@
 
 WORK_DIR=/opt/nezha/nz-talon
 
+
+service_exists(){
+    local n=$1
+    if [[ $(systemctl list-units --all -t service --full --no-legend "$n.service" | sed 's/^\s*//g' | cut -f1 -d' ') == $n.service ]]; then
+        return 0
+    else
+        return 1
+    fi
+}
+
+compareMD5(){
+  if [ ! -f $1 ] || [ ! -f $2 ];then
+    echo 1
+    return 1
+  fi
+
+  local f1MD5=`md5sum $1|awk '{print $1}'`
+  local f2MD5=`md5sum $2|awk '{print $1}'`
+
+  if [ ${f1MD5} = ${f2MD5} ];then
+      echo 0
+      return 0
+  else
+      echo 1
+      return 1
+  fi
+}
+
+# 还原配置文件
+# $1 需要还原的文件目录 /opt/nezha/nz-talon/config  /opt/nezha/nz-talon/promtail ...
+# $2 备份文件目录       /tmp/nezha/nz-talon/config /tmp/nezha/nz-talon/promtail ...
+restoreComponentConfig(){
+  if [ ! -d $1 ] || [ ! -d $2 ];then
+    echo "Directory does not exist"
+    return 1
+  fi
+
+  for i in $(ls $2);do
+    if [ 1 -eq `compareMD5 $1/$i $2/$i` ];then
+      echo 'return config file '$1/${i}
+      cp -f $2/$i $1/$i
+    fi
+  done
+}
+
+
 # Find Java
 if [[ -x "$WORK_DIR/jdk/bin/java" ]]; then
     JAVA_EXE="$WORK_DIR/jdk/bin/java"
@@ -119,46 +165,3 @@ EOF
     fi
 fi
 
-service_exists(){
-    local n=$1
-    if [[ $(systemctl list-units --all -t service --full --no-legend "$n.service" | sed 's/^\s*//g' | cut -f1 -d' ') == $n.service ]]; then
-        return 0
-    else
-        return 1
-    fi
-}
-
-compareMD5(){
-  if [ ! -f $1 ] || [ ! -f $2 ];then
-    echo 1
-    return 1
-  fi
-
-  local f1MD5=`md5sum $1|awk '{print $1}'`
-  local f2MD5=`md5sum $2|awk '{print $1}'`
-
-  if [ ${f1MD5} = ${f2MD5} ];then
-      echo 0
-      return 0
-  else
-      echo 1
-      return 1
-  fi
-}
-
-# 还原配置文件
-# $1 需要还原的文件目录 /opt/nezha/nz-talon/config  /opt/nezha/nz-talon/promtail ...
-# $2 备份文件目录       /tmp/nezha/nz-talon/config /tmp/nezha/nz-talon/promtail ...
-restoreComponentConfig(){
-  if [ ! -d $1 ] || [ ! -d $2 ];then
-    echo "Directory does not exist"
-    return 1
-  fi
-
-  for i in $(ls $2);do
-    if [ 1 -eq `compareMD5 $1/$i $2/$i` ];then
-      echo 'return config file '$1/${i}
-      cp -f $2/$i $1/$i
-    fi
-  done
-}
diff --git a/tools/afterremove.sh b/tools/afterremove.sh
index 8ac5395..db73c86 100644
--- a/tools/afterremove.sh
+++ b/tools/afterremove.sh
@@ -1,4 +1,14 @@
 #!/bin/sh
+
+service_exists(){
+    local n=$1
+    if [[ $(systemctl list-units --all -t service --full --no-legend "$n.service" | sed 's/^\s*//g' | cut -f1 -d' ') == $n.service ]]; then
+        return 0
+    else
+        return 1
+    fi
+}
+
 if [ 0 -eq $1 ];then
 
 	echo 'start remove nz-talon module from disk...'
@@ -33,11 +43,4 @@ if [ 0 -eq $1 ];then
 	echo 'uninstall success!'
 fi
 
-service_exists(){
-    local n=$1
-    if [[ $(systemctl list-units --all -t service --full --no-legend "$n.service" | sed 's/^\s*//g' | cut -f1 -d' ') == $n.service ]]; then
-        return 0
-    else
-        return 1
-    fi
-}
+
diff --git a/tools/beforeinstall.sh b/tools/beforeinstall.sh
index 84da859..c1cccfa 100644
--- a/tools/beforeinstall.sh
+++ b/tools/beforeinstall.sh
@@ -4,6 +4,17 @@ TALON_PATH=/opt/nezha/nz-talon
 PROMTAIL_PATH=/opt/nezha/promtail
 TELEGRAF_PATH=/opt/nezha/telegraf
 
+
+service_exists(){
+    local n=$1
+    if [[ $(systemctl list-units --all -t service --full --no-legend "$n.service" | sed 's/^\s*//g' | cut -f1 -d' ') == $n.service ]]; then
+        return 0
+    else
+        return 1
+    fi
+}
+
+
 if [ 2 -eq $1 ];then
 	
 	if [ ! -d ${TALON_PATH}/config ];then
@@ -52,12 +63,3 @@ if [ 2 -eq $1 ];then
 	fi
 fi
 
-
-service_exists(){
-    local n=$1
-    if [[ $(systemctl list-units --all -t service --full --no-legend "$n.service" | sed 's/^\s*//g' | cut -f1 -d' ') == $n.service ]]; then
-        return 0
-    else
-        return 1
-    fi
-}