Say I have a file:
# file: 'test.txt' foobar bash 1 bash foobar happy foobar
I only want to know what words appear after "foobar", so I can use this regex:
The parenthesis indicate that I have a special interest in the word right after foobar. But when I do a
grep "foobar \(\w\+\)" test.txt, I get the entire lines that match the entire regex, rather than just "the word after foobar":
foobar bash 1 foobar happy
I would much prefer that the output of that command looked like this:
Is there a way to tell grep to only output the items that match the grouping (or a specific grouping) in a regular expression?