how to find a string in file with grep

Subject:

grep -rnw '/path/to/somewhere/' -e "pattern"

  • -r or -R is recursive,
  • -n is line number, and
  • -w stands match the whole word.
  • -l (lower-case L) can be added to just give the file name of matching files.
  • Along with these, --exclude or --include parameter could be used for efficient searching. Something like below:
2016-07-12 12:09:27gstlouis