How to search recursively for a string in a prompt in windows?

Question

I've installed unixutils,and grep string * can search string in the current directory,

but how to make it search recursively?

Answer 1

Use the -R switch for a recursive search (or -r or --recursive).

from the man page:

-R, -r, --recursive
          Read all files under each directory, recursively; this is equiv-
          alent to the -d recurse option.

Answer 2

Alternatively, if you don't need grep-specific functionality: Windows supports this out of the box anyway:

findstr /s "string"