usually `info` only works on a GNU derived OS. `man -k` has worked on every flavor of unix I've met. edit: `man -k ''` might be a GNUism too. Just tried on a

usually `info` only works on a GNU derived OS. `man -k` has worked on every flavor of unix I've met. edit: `man -k ''` might be a GNUism too. Just tried on a BSD derived OS and got back nothing.