Bash foreach 循环 [英] Bash foreach loop

问题描述

我有一个输入(比方说一个文件).每行都有一个文件名.如何读取此文件并显示每个文件的内容.

I have an input (let's say a file). On each line there is a file name. How can I read this file and display the content for each one.

推荐答案

类似这样的事情:

xargs cat <filenames.txt

xargs 程序读取其标准输入，并且对于每一行输入运行 cat 程序，将输入行作为参数.

The xargs program reads its standard input, and for each line of input runs the cat program with the input lines as argument(s).

如果您真的想循环执行此操作，您可以:

If you really want to do this in a loop, you can:

for fn in `cat filenames.txt`; do
    echo "the next file is $fn"
    cat $fn
done

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