在'grep'结果中包含标题 [英] Include header in the 'grep' result

问题描述

有没有办法将'head -1'和'grep'命令合并为一个目录中的所有文件，并将输出重定向到输出文件。我可以使用'sed'来做到这一点，但它似乎没有grep那么快。

Is there a way to combine 'head -1' and 'grep' command into one for all the files in a directory and redirect the output to an output file. I can do this using 'sed' but it seems that it is not as fast as grep.

sed -n '1p;/6330162/p' infile*.txt > outfile.txt

使用grep我可以一次完成以下一个文件：

Using grep I can do the following one file at a time:

head -1 infile1.txt;  grep -i '6330162' infile1.txt > outfile.txt

但是，我需要为目录中的所有文件执行此操作。插入通配符并没有什么帮助，因为它首先打印标题，然后是grep输出。

However, I need to do it for all files in the directory. Inserting a wildcard is not helping as it is printing headers first and then the grep output.

推荐答案

for file in *
do
  [ "$file" = outfile.txt ] && continue
  head -n 1 "$file"
  grep -i '...' "$file"
done > outfile.txt

这篇关于在'grep'结果中包含标题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！