Gnucash an Open source application provides accounting functions suitable for use by small businesses and individuals. It can track finances in multiple accounts, keeping running and reconciled balances. It has an X based graphical user interface, double entry, a hierarchy of accounts, expense accounts (categories), and can import Quicken QIF files and OFX files. The current stable release is 2.6.3 and is available for Ubuntu 12.04, 13.10, 14.04.
$ wget -q -O- http://archive.getdeb.net/getdeb-archive.key | sudo apt-key add -
$ sudo sh -c 'echo "deb http://archive.getdeb.net/ubuntu/ $(lsb_release -sc)-getdeb apps" >> /etc/apt/sources.list'
$ sudo apt-get update
$ sudo apt-get install gnucash
sudo apt-get remove gnucash