bash 如何从多个文件中读取数据行
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How to read lines of data from multiple files
提问by conandor
I need to extract data from files in directory /tmp/log.
I have no problem extract from single file.
我需要从目录中的文件中提取数据/tmp/log。我从单个文件中提取没有问题。
#!/bin/bash
while read line;
do
echo $line
done < /tmp/log/file1
I want try it with multiple files /tmp/log/*but it returned error ambiguous redirect.
Any idea how can I around it?
我想用多个文件尝试它，/tmp/log/*但它返回了错误ambiguous redirect。知道我该如何解决吗？
回答by jcollado
You could read the files in a for loop as follows:
您可以在 for 循环中读取文件，如下所示：
for file in /tmp/log/*; do
while read -r line; do
echo "$line"
done < "$file"
done
The strategy is just wrap your while loop with a for loop that takes care of processing each of the files one at a time.
该策略只是将您的 while 循环包裹在一个 for 循环中，该循环负责一次处理每个文件。
回答by Vijay
Dont know exactly waht you need.. probably you are looking for this:
不知道你到底需要什么......可能你正在寻找这个：
cat /tmp/log/*
Is this what you need?
这是你需要的吗？
for line in `cat /tmp/log/*`
do
echo $line
done
