Permissions and OSX

[Rod Clifford]

This is aimed for the unix (read: smart) members of the list:
Is there a way in terminal to globally change permissions to folders 
containing files copied from another machine?

We frequently swap files between machines, permissions for the files 
have been set by machine A (original owner)
and cannot be changed by machine B (new owner who copied the files onto 
his machine) "you do not have permission to modify
this file".
Changing permissions on the folder for the files is pretty hit and 
miss. Individual files are usually owned by "nobody" with
guests having read only access.

help

Rod