问题描述
对不起，如果这是一个noobie问题，但我不能找到一个很好的答案。
sorry if this is a noobie question but I can't find a good answer.
要找到然后取出东西，我可以使用
To find then remove something I can use
find . -name ".txt" -exec rm "{}" \;
但为什么我就不能管的结果，RM像
But why can't I just pipe the results to rm like
find . -name ".txt" | rm
就像我觉得应该是到grep
like I would pipe it to grep
find . -name ".txt" | grep a
我从某处，RM阅读并不需要从标准输入，因此，我不能管，但到底是什么意思呢？当我在RM型A.TXT它从标准输入读取就像我可以grep吧？或者是有标准输入和命令行之间的差异。救命啊！
I've read from somewhere that rm doesn't take input from stdin and therefore I can't pipe it but what does that mean? When I type in rm a.txt it reads from standard input just like I can grep right? Or is there a difference between stdin and command line. Help!
推荐答案
要扩大@Alex Gitelman的回答：是的，有标准输入和命令行之间的差异
To expand on @Alex Gitelman's answer: yes, there's a difference between "standard input" and the command line.
当你键入 RM A.TXT b.txt c.txt ，你以后 RM 列出文件被称为的参数的，并提供通过一个特殊的变量RM（名为的argv 内部）。标准输入，而另一方面，看上去到Unix程序就像一个名为标准输入文件。程序可以从该文件中读取数据，就像它，如果它打开磁盘上的常规文件，并且从读取。
When you type rm a.txt b.txt c.txt, the files you list after rm are known as arguments and are made available to rm through a special variable (called argv internally). The standard input, on the other hand, looks to a Unix program like a file named stdin. A program can read data from this "file" just as it would if it opened a regular file on disk and read from that.
RM ，像许多其他程序，需要在命令行及其参数，但忽略标准输入。你可以管任何事情它你喜欢的;它会只是把这些数据了。这就是的xargs 就派上用场了。它读取标准输入线，把他们变成命令行参数，这样可以有效地管数据到另一个程序的命令行。这是一个巧妙的方法。
rm, like many other programs, takes its arguments from the command line but ignores standard input. You can pipe anything to it you like; it'll just throw that data away. That's where xargs comes in handy. It reads lines on standard input and turns them into command-line arguments, so you can effectively pipe data to the command line of another program. It's a neat trick.
例如：
find . -name ".txt" | xargs rm
find . -name ".txt" | grep "foo" | xargs rm
请注意，这将无法正常工作，如果有包含换行符或空格的任何文件名。
为了处理包含换行符或空格，你应该使用的文件名：
Note that this will work incorrectly if there are any filenames containing newlines or spaces.To deal with filenames containing newlines or spaces you should use instead:
find . -name ".txt" -print0 | xargs -0 rm
这将告诉找到以空字符，而不是一个新行终止的结果。
然而，的grep 不会像以前那样工作，然后。相反，使用：
This will tell find to terminate the results with a null character instead of a newline.However, grep won't work as before then. Instead use this:
find . -name ".txt" | grep "foo" | tr "\n" "\0" | xargs -0 rm
这个时间 TR 用于所有的换行转换成空字符。
This time tr is used to convert all newlines into null characters.
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