在 grep 中省略文件名

Question

我正在从多个文件中提取一个字符串，但一个不希望的副作用是输出前的文件名。如何仅使用 grep 抑制文件名输出？

  $ grep -i lp lpNet* 
    lpNet:This was printed via the internet using the lp command.
    lpNet:I believe lp doesnt care what the device is. 
    lpNet1:This was printed via the internet using the lp command.
    lpNet1:I believe lp doesnt care what the device is. 
    lpNet2:This was printed via the internet using the lp command.
    lpNet2:I believe lp doesnt care what the device is. 
    lpNet3:This was printed via the internet using the lp command.
    lpNet3:I believe lp doesnt care what the device is. 

我现在使用 cat lpNet* 解决了这个问题 | grep lp 我只是想知道是否有更有效的途径来达到同样的效果

Answer 1

默认行为是在给定多个文件参数时打印文件名 - 要禁止此操作，您可以添加-h或 --no-filename 选项

从Output Line Prefix Controlgrep 手册页的部分：

   -h, --no-filename
          Suppress the prefixing of file names on  output.   This  is  the
          default  when there is only one file (or only standard input) to
          search.