rgrep(1) on Linux
The text 6fec64b79311, as Debian 2.1 (Slink) shipped it.
a recursive, highlighting grep program
Flags it lists
-
-? -
-D -
-F -
-H -
-N -
-R -
-W -
-c -
-h -
-i -
-l -
-n -
-r -
-v -
-x