交互式输入shell参数

Let's write a script that reads input interactively and uses this script for automation examples:

#!/bin/bash

#Filename: interactive.sh

read -p "Enter number:" no ; #-p "Enter number:" 打印互动信息到output

read -p "Enter name:" name

echo You have entered $no, $name;

Let's automate the sending of input to the command as follows:

$ echo -e "1\nhello\n" | ./interactive.sh #-e 允许反斜杠的运用，默认是disable的，\n相当于回车

You have entered 1, hello

下面的能达到上面同样效果

We have used echo -e to produce the input sequence. If the input is large we can use an

input file and redirection operator to supply input.

$ echo -e "1\nhello\n" > input.data

$ cat input.data

1

hello

You can also manually craft the input file without echo commands by hand typing. For

example:

$ ./interactive.sh < input.data

This redirects interactive input data from a file.