更新 'coffeesystem.sh'

coffeesystem.sh

@@ -174,4 +174,6 @@ printenv | grep ROS
 
 step8_t2=$(date +"%S")
 echo 'Item8 ROS ubuntu 18.04 melodic 安裝時間:' $((step8_t2-step8_t1)) '秒' >>/home/使用者/test.log
-echo "ROS done"
+echo "ROS done"
+
+export DEBIAN_FRONTEND="dialog"