HOW-TO Extract Lines from File A that Contains Words in File B?

[iRuser]

I think you might be able to achieve this playing around with some of the hashcat utilities but here is a short python snippet you can use as well:

Code:

#!/usr/bin/env python

import re

fileA = 'fileA.txt'  # Your main input file
fileB = 'fileB.txt'  # Your file full of stuff to match against
fileC = 'fileC.txt'  # Output file we will save matching lines to

fr=open(fileA)                            # File Reader Handle
fw=open(fileC, 'w+')                      # File Writer Handle
tokens_to_match = open(fileB).readlines() # Read All Lines from FileB into an Array

# Iterate line by line in FileA
for line in fr:
  # Check if any matches from fileB exist
  for token in tokens_to_match:
    # If match, then log the matching line to fileC
    if re.search(token.strip(), line.strip()):
      fw.write(line.strip() + "\n")

fr.close()
fw.close()

Just edit the filenames and paths for fileA, fileB (optionally fileC) and then run:
python scriptname.py

When it is done you should find fileC.txt in the same directory as the script with your matched lines.

Hope that helps a bit....