Return only the regex match, not the whole line

Question

I have a multiline document from which I\'m looking to extract a particular keyword and the word after that. It looks like this:

Answer 1

grep(1) has a -o flag that outputs only the matching part of the line. From the man page:

  -o, --only-matching
      Show only the part of a matching line that matches PATTERN.

Your pattern isn't right to get the output you want, though. Try:

$ egrep -o 'key \w+' file 
key word1
key word2