fix confirm bug

util.sh

@@ -16,11 +16,11 @@ do
 
 	case $input in
 	    [yY][eE][sS]|[yY])
-			return 1
+			return 0
 			;;
 
 	    [nN][oO]|[nN])
-			return 0
+			return 1
 			;;
 
 	    *)
@@ -54,7 +54,7 @@ function initFilebeatService(){
 
 if [ "$(systemctl list-units |grep -c $serviceName)" -gt 0 ]; then \
   red "$serviceName service exist";\
-  if [ "$(confirm 'are you want override it?')" == 0 ]; then \
+  if confirm "are you want override it?"; then \
       green "exit"
       exit 0;
   fi