Yes, just put it in the Trash and empty the Trash. The Trash icon in the Dock shows a kind of collection of all files in a .Trash folder that you have permissions to. Thus, it will show files that belong to you that you have trashed from another drive or partition, even though the file is still on the other drive, but in the invisible .Trash folder of that drive. It will NOT show files that belong to other users that are in the other user's .Trash folder, either on your startup drive, or if permissions are enabled on another drive or partition (I believe FAT32 doesn't really have true UNIX permissions, and thus doesn't support this rule--you should see all files, regardless of ownership--that are in the .Trash folder).
As to viewing hidden files, many utilities allow you turn this on, including Tinkertool and I believe OnyX. You can turn it on yourself using Terminal, but the result is an amazing amount of clutter, and an increase in the chances of having an unfortunate accident by tinkering with something you shouldn't. I believe it is better to simply use Terminal to see a list of all files, hidden and otherwise. Just use a list all command: ls, a space, the -a option, another space, then the path to what you want to see. Try this:
ls -a /
That will show you a list of everything at the root level of your startup drive.
Francine
Francine
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