This guide can be used in conjunction with my previous, related post, Installing and using Tomb in Ubuntu 11.10.
Tomb is a lightweight encryption tool for managing encrypted containers. It’s ideal for backing up password files somewhere on the Internet since you keep the keyfile separate, like on your USB memory drive. With the release of Google Drive, Google has provided an excellent service for your Tomb files (in tandem with Google Authenticator, a free multi-factor authentication service, you can better secure your Google-managed data). Ubuntu One is another cloud-based service which is also free.
# sudo apt-get update ; sudo apt-get install build-essential autoconf libtool libgtk2.0-dev libnotify-dev zsh pinentry-curses pinentry-gtk2 debconf git vim
# git clone git://github.com/cryptodotis/Tomb.git
# sudo vim /etc/apt/sources.list
# wget http://apt.dyne.org/software.pub
# gpg --import software.pub
# sudo apt-key add ~/.gnupg/pubring.gpg
# sudo apt-get update ; sudo apt-get install -y tomb
# tomb -v
Then check out how to use Tomb here: Installing and using Tomb in Ubuntu 11.10.