On Monday 01 January 2007 15:24, David Relson <relson@osagesoftware.com> 
wrote about 'Re: [gentoo-user] revdep-rebuild / missing ebuild':
> One can list binaries known to portage with:
>
>    cat /var/db/pkg/*/*/CONTENTS | grep /usr/bin/
>
> If that's compared to /usr/bin/*, orphaned binaries can be identified.

What about stuff installed to /bin, /sbin, and /usr/sbin?  Or even rarer 
places like somewhere under the /opt tree.

-- 
"If there's one thing we've established over the years,
it's that the vast majority of our users don't have the slightest
clue what's best for them in terms of package stability."
-- Gentoo Developer Ciaran McCreesh