Installing Amazon EC2 tools on Ubuntu 10.04

The Amazon EC2 ami and api tool packages are not found by apt-get using the default sources list. You need to add 'multiverse' to the list. Here is how you install the tools:

$ sudo perl -pi -e 's%(universe)$%$1 multiverse%'  /etc/apt/sources.list
$ sudo apt-get update
$ sudo apt-get install ec2-ami-tools

Of course, you also need to set up your environment variables as per usual so that the tools can access your keys.