Copy with piped answer

On linux when copying many files you can pipe 'y' to answer all those annoying questions about overwriting existing files..

yes y | cp -i blah1/* blah2

or even just..

yes | cp -i blah1/* blah2

Or of course you could answer 'n' instead or anything else you want to pipe as the answer to any command or script you run..

yes boo | somecommand