Follow these steps for installing KeePass 2
Press Alt+Ctrl+T to start terminal and run following commands one by one.
sudo apt-add-repository ppa:jtaylor/keepass
sudo apt-get update
sudo apt-get install keepass2 mono-complete
Go to this link and download "KeePassHttp.dll" and "Newtonsoft.Json.dll"
Press Alt+F2 and run
gksu nautilus to open Nautilus as root.
Copy both files to:
Open Chrome/Chromium and install ChromeIPass
Open KeePass, and visit any login page in Chrome/Chromium i.e gmail.com.
Click the KeePass icon in the URL bar and click the "Connect" button.
You should see this dialog box
Enter any name for your browser here and save it. That's It.