until [[ $flag == "yes" || $flag == "exit" ]] do read -p "请确认统一/合服前后数据是否一致，输入yes继续执行脚本，输入exit退出：" flag if [[ $flag = "yes" ]]; then break elif [[ $flag = "exit" ]];then exit else continue fi done
做个记录
原文：http://www.cnblogs.com/hjfeng1988/p/4024935.html