print lines matching a pattern |
-R, -r, --recursive Read all files under each directory, recursively; this is equivalent to the -d recurse option. |
--include=GLOB Search only files whose base name matches GLOB (using wildcard matching as described under --exclude). |
grep searches the named input FILEs (or standard input if no files are named, or if a single hyphen-minus (-) is given as file name) for lines containing a match to the given PATTERN. By default, grep prints the matching lines. |