How can you use the terminal or the inner workings of MacOSX to force delete files? I have two files which I know are no longer in use, after multiple reboots, but one of them , a failed IE download, will not move to the trash despite repeated attempts, since it seems to think it is in use. Another is a small application which cannot delete because it is also "in use". Clearly this is not the case. Can someone help me and tell me how you can force the deletion of these items? Thanks.