Yes, there is grep. It has an option for recursive directory traversal, e.g.:

grep -r specificstring path

With GNU grep you can restrict the searched files with the --include and --exclude pattern options.

-H is the default with -R (or -r which is the same and easier to type). You can also pipe the results of grep to less for screen paging.

Yes, there is grep. It has an option for recursive directory traversal, e.g.:

$ grep -r specificstring path

With GNU grep you can restrict the searched files with the --include and --exclude pattern options.

-H ('Print the file name for each match') is the default with -r, -R and when you specify multiple files on the command line. -R also turns on recursive directory traversal but also follows symbolic links. 

You can also pipe the results of grep to less for screen paging.