Цитата из http://linuxg.net/how-to-install-wikidpad-2-2-on-ubuntu-linux-mint-pinguy-os-and-elementary-os/
Установите WikidPad 2.2 на Ubuntu 14.04wget -q -O - http://archive.getdeb.net/getdeb-archive.key | sudo apt-key add -
sudo sh -c 'echo "deb http://archive.getdeb.net/ubuntu trusty-getdeb apps" >> /etc/apt/sources.list.d/getdeb.list'
sudo apt-get update
sudo apt-get install wikidpad