We do not care about the case of the expression, so both y and Y do work. Are you sure there has not been any other input before the Y like a space?
** Changed in: apt (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1793437 Title: apt installation on ubuntu 18.04 works only with 'y' and not with 'Y'. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1793437/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs