请大神指教
执行下面的脚本
#select usage
#!/bin/bash
echo "what is your favourite os"
select os_var in "linux" "windows" "other"
do
break
done
echo "your favorite os is $os_var"
显示信息
what is your favourite os
select.sh: 4: select: not found
select.sh: 5: Syntax error: "do" unexpected
