Installing Keepass2 on Ubuntu 11.04

Run the following terminal:

sudo apt-add-repository ppa:jtaylor/keepass
sudo apt-get update
sudo apt-get install keepass2

This will install keepass2 as well as mono libraries. The following packages were installed for me:

keepass2 libgdiplus libmono-accessibility2.0-cil libmono-data-tds2.0-cil
  libmono-messaging2.0-cil libmono-sqlite2.0-cil
  libmono-system-data-linq2.0-cil libmono-system-data2.0-cil
  libmono-system-messaging2.0-cil libmono-system-runtime2.0-cil
  libmono-system-web2.0-cil libmono-wcf3.0-cil libmono-webbrowser0.5-cil
  libmono-winforms2.0-cil libmono2.0-cil libsqlite0