shell 交互式选择（select）

新建文件

sudo vi test.sh

写入如下内容：

#!/bin/bash

echo "What is your favourite OS?"
select var in "Linux" "Gnu Hurd" "Free BSD" "Other"; do
  break;
done
echo "You have selected $var"

赋予执行权限

sudo chmod +x test.sh

执行

./test.sh

输出：

What is your favourite OS?
1) Linux
2) Gnu Hurd
3) Free BSD
4) Other
#? 2
You have selected Gnu Hurd