blocks|key|764828|text|尽管这可能比您想要的更复杂/更重，但一种非常灵活的方法是使用类似Expect的东西(或者使用另一种编程语言的派生语言)。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|764829|Expect是一种专门为控制基于文本的应用程序而设计的语言，这正是您要做的事情。如果你最终需要做一些更复杂的事情(比如用逻辑来决定下一步要做什么/回答什么)，那么Expect就是最好的选择。|764830|entityMap|0|LINK|mutability|MUTABLE|url|http://www.nist.gov/el/msid/expect.cfm^0|W|6|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

Although this may be more complicated/heavier-weight than you want, one very flexible way to do it is using something like <a href="http://www.nist.gov/el/msid/expect.cfm" rel="noreferrer">Expect</a> (or one of the derivatives in another programming language).

Expect is a language designed specifically to control text-based applications, which is exactly what you are looking to do. If you end up needing to do something more complicated (like with logic to actually decide what to do/answer next), Expect is the way to go.

blocks|key|764885|text|echo+y+%7C+command应该可以工作。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|764886|此外，一些安装程序有一个"auto-yes“标志。这是Ubuntu上apt-get版的-y。|764887|entityMap^0|0|G|0|Y|7|17|2|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|R|8|@]|D|@]|E|$]]]|I|$]]

<code>echo y | command</code> should work.

Also, some installers have an "auto-yes" flag. It's <code>-y</code> for <code>apt-get</code> on Ubuntu.

blocks|key|548155|text|'yes'+command将无限期地回显'y‘(或您要求它执行的任何操作)。将其用作：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|548156|yes+%7C+command-that-asks-for-input|code-block|syntax|javascript|548157|或者，如果需要大写'Y‘：|548158|yes+Y+%7C+command-that-asks-for-input|548159|548160|如果你想传递'N‘，你仍然可以使用yes|style|CODE|548161|yes+N+%7C+command-that-asks-for-input|548162|entityMap|0|LINK|mutability|MUTABLE|url|http://en.wikipedia.org/wiki/Yes_(Unix)^0|0|D|0|0|0|0|0|0|H|3|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@]|9|@$A|12|B|13|1|14]]|C|$]]|$1|D|3|E|5|F|7|15|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|16|8|@]|9|@]|C|$]]|$1|K|3|L|5|F|7|17|8|@]|9|@]|C|$G|H]]|$1|M|3|-4|5|6|7|18|8|@]|9|@]|C|$]]|$1|N|3|O|5|6|7|19|8|@$A|1A|B|1B|P|Q]]|9|@]|C|$]]|$1|R|3|S|5|F|7|1C|8|@]|9|@]|C|$G|H]]|$1|T|3|-4|5|6|7|1D|8|@]|9|@]|C|$]]]|U|$V|$5|W|X|Y|C|$Z|10]]]]

The <a href="http://en.wikipedia.org/wiki/Yes_(Unix)" rel="noreferrer">'yes' command</a> will echo 'y' (or whatever you ask it to) indefinitely. Use it as:
<pre><code>yes | command-that-asks-for-input
</code></pre>
or, if a capital 'Y' is required:
<pre><code>yes Y | command-that-asks-for-input
</code></pre>
<hr />
If you want to pass 'N' you can still use <code>yes</code>:
<pre><code>yes N | command-that-asks-for-input
</code></pre>

blocks|key|765072|text|您可能无法在目标服务器上安装Expect。例如，在编写Jenkins作业时，通常会出现这种情况。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|765073|如果是这样的话，我会考虑在askubuntu.com上对以下问题的答案：|765074|https://askubuntu.com/questions/338857/automatically-enter-input-in-command-line|offset|length|765075|printf+'y\nyes\nno\nmaybe\n'+%7C+./script_that_needs_user_input|code-block|syntax|javascript|765076|请注意，在极少数情况下，该命令不要求用户在字符后按enter键。在这种情况下，省略换行符：|765077|printf+'yyy'+%7C+./script_that_needs_user_input|765078|为了完整起见，您还可以使用此处的文档：|765079|./script_that_needs_user_input+<<+EOF
y
y
y
EOF|765080|或者，如果您的shell支持此处的字符串：|765081|./script+<<<+"y
y
y
"|765082|或者，您可以创建一个每行只有一个输入的文件：|765083|./script+<+inputfile|765084|同样，这个答案的所有功劳都归功于the+answer+on+askubuntu.com的作者lesmana。|765085|entityMap|0|LINK|mutability|MUTABLE|url|1|https://askubuntu.com/a/338860^0|0|0|0|28|0|0|0|0|0|0|0|0|0|0|0|G|R|1|0^^$0|@$1|2|3|4|5|6|7|1D|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1E|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|1F|8|@]|9|@$F|1G|G|1H|1|1I]]|A|$]]|$1|H|3|I|5|J|7|1J|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|1K|8|@]|9|@]|A|$]]|$1|O|3|P|5|J|7|1L|8|@]|9|@]|A|$K|L]]|$1|Q|3|R|5|6|7|1M|8|@]|9|@]|A|$]]|$1|S|3|T|5|J|7|1N|8|@]|9|@]|A|$K|L]]|$1|U|3|V|5|6|7|1O|8|@]|9|@]|A|$]]|$1|W|3|X|5|J|7|1P|8|@]|9|@]|A|$K|L]]|$1|Y|3|Z|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|10|3|11|5|J|7|1R|8|@]|9|@]|A|$K|L]]|$1|12|3|13|5|6|7|1S|8|@]|9|@$F|1T|G|1U|1|1V]]|A|$]]|$1|14|3|-4|5|6|7|1W|8|@]|9|@]|A|$]]]|15|$16|$5|17|18|19|A|$1A|E]]|1B|$5|17|18|19|A|$1A|1C]]]]

You might not have the ability to install Expect on the target server. 
This is often the case when one writes, say, a Jenkins job. 

If so, I would consider something like the answer to the following on askubuntu.com: 

<a href="https://askubuntu.com/questions/338857/automatically-enter-input-in-command-line">https://askubuntu.com/questions/338857/automatically-enter-input-in-command-line</a>

<pre><code>printf 'y\nyes\nno\nmaybe\n' | ./script_that_needs_user_input
</code></pre>

Note that in some rare cases the command does not require the user to press enter after the character. in that case leave the newlines out:

<pre><code>printf 'yyy' | ./script_that_needs_user_input
</code></pre>

For sake of completeness you can also use a here document:

<pre><code>./script_that_needs_user_input &lt;&lt; EOF
y
y
y
EOF
</code></pre>

Or if your shell supports it a here string:

<pre><code>./script &lt;&lt;&lt; "y
y
y
"
</code></pre>

Or you can create a file with one input per line:

<pre><code>./script &lt; inputfile
</code></pre>

Again, all credit for this answer goes to the author of <a href="https://askubuntu.com/a/338860">the answer on askubuntu.com</a>, lesmana.

blocks|key|548257|text|如果您只想接受默认值，您可以使用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|548258|\n+%7C+./shell_being_run|code-block|syntax|javascript|548259|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

If you want to just accept defaults you can use:

<pre><code>\n | ./shell_being_run
</code></pre>

blocks|key|765180|text|您只需将-y与安装命令放在一起即可。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|765181|例如：yum+install+<package_to_install>+-y|765182|entityMap^0|4|2|0|3|Z|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|P|8|@]|D|@]|E|$]]]|I|$]]

You just need to put <code>-y</code> with the install command.

For example: <code>yum install &lt;package_to_install&gt; -y</code>

I work with Amazon Linux instances and I have a couple scripts to populate data and install all the programs I work with, but a couple of the programs ask:

<pre><code>Do you want to continue [Y/n]?
</code></pre>

and pause the install. I want to auto answer "Y" in all cases, I'm just now sure how to do it.

How do I script a "yes" response for installing programs?

服务器

Ubuntu

Linux

我使用Amazon Linux实例，我有几个脚本来填充数据并安装我使用的所有程序，但有几个程序会问：Do you want to continue [Y/n]?并暂停安装。我想在所有情况下自动回答"Y“，我只是现在确定怎么做。

问如何编写安装程序的"yes“响应脚本？
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