where is what?

[Keith Harbaugh <harbaugh@math.georgetown.edu>]

`what' was an old unix program which would access certain identifying
lines within text files, allowing easy reading of key parts of files
without having to use a pager or editor.

I used the search features of the debian web site's Package page, searching
on `what', but to no avail (the first search yielded the empty set,
the second search more than would fit on a page, but all that was not
the "right" what) (eh, what?).

So, two questions:
1) where (i.e., in what package) is the program `what' to be found?
2) how could I effectively use the web pages search, or some other search
   capability, to have answered that question without bothering the
   debian mailing lists?