read case

read -p "请输入安装程序编号:" n
case $n in
  1)
    read -p "确定要安装程序吗?[Y/y]" s
    if [ $s == "Y" -o $s == "y" ];then
            nginx_install
    else
            printf "没有选择[Y/y]安装程序,程序退出!\n"
            echo -e "\033[40;37m"
            exit 1
    fi
  *)
  echo "没有选择安装程序编号,程序退出!"
        echo -e "\033[40;37m"
        exit 1
esac