[geeks] listing identical files

[Kevin]

Anyone know of a way of listing all the identical files in a
directory?

I have a directory containing several large files, many of which
are just duplicates with differing names.  I would like to find a
way to list all the identical files to help rescue some drive
space.

There is probably a simplistic way to do this, but it escapes me,
as i don't have much experience with any type of shell scripting.

Thanks, any input is welcome.
/KRM