Debian / Linux中[y / n]的自动化

Question

I am writing a script file to automate. I am downgrading a Php version of the machine. The command that I am using is interactive.

It will ask me three question which I need to respond to in the form of n/Y/q.

I know I can use yes | {command} yes | {command} . But I need to give series of No,Yes,Yes.

How can I do that?

I even tried doing echo " NYY" | command echo " NYY" | command but it's not working.

I am using Debian Wheezy.

Any help?

Answer 1

您需要在每个答案之间添加换行符：

printf "N\nY\nY\n" | command

Answer 2

You need new line character '\\n':

echo -ne 'N\nY\nY\n' | command

Failing that you can use expected which was already mentioned.

Answer 3

尝试这个

echo N Y Y | xargs -n 1