Under normal circumstances, a command typed in a Terminal/shell can be retrieved later via history command or other means.
Is there any way to have an "incognito" Terminal/shell, i.e. one whose commands are not remembered in any way after it is closed?
One use for this would be to charge a credit card, or perform other security sensitive commands.
A potential answer is to boot a Linux "Live CD" and then shut it down. Any other (easier) approaches that would work in OS X/Linux/Windows?