how perform grep operation on all files in a directory

linux shell grep
user2147075 picture user2147075 · Mar 8, 2013 · Viewed 349k times · Source

Working with xenserver, and I want to perform a command on each file that is in a directory, grepping some stuff out of the output of the command and appending it in a file.

I'm clear on the command I want to use and how to grep out string(s) as needed.

But what I'm not clear on is how do I have it perform this command on each file, going to the next, until no more files are found.

Answer

umi picture umi · Mar 8, 2013

grep $PATTERN * would be sufficient. By default, grep would skip all subdirectories. However, if you want to grep through them, grep -r $PATTERN * is the case.

Related questions

How to 'grep' a continuous stream?

Is that possible to use grep on a continuous stream? What I mean is sort of a tail -f <file> command, but with grep on the output in order to keep only the lines that interest me. I've …

Read More
List file names based on a filename pattern and file content?

How can I use Grep command to search file name based on a wild card "LMN2011*" listing all files with this as beginning? I want to add another check on those file content. If file content has some thing like …

Read More
How to remove the lines which appear on file B from another file A?

I have a large file A (consisting of emails), one line for each mail. I also have another file B that contains another set of mails. Which command would I use to remove all the addresses that appear in file …

Read More