You just double-click on them and follow the instructions. If for some reason that doesn't work then you can run 'dpkg -i <filenames>'
Here are some new links that work: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.15.1/linux- headers-4.15.1-041501_4.15.1-041501.201802031831_all.deb http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.15.1/linux- headers-4.15.1-041501-generic_4.15.1-041501.201802031831_amd64.deb http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.15.1/linux- image-4.15.1-041501-generic_4.15.1-041501.201802031831_amd64.deb -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1745828 Title: [rtl8821a] Ubuntu 16.04 can't find any Bluetooth devices To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/bluez/+bug/1745828/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs