Start by installing Juju on a server:
matthew@wolfram~$: sudo apt-get install juju
Next, you must bootstrap the system, configuring it to use either a cloud resource, like Amazon Web Services or EC2 or your local environment (if you are using a local machine for development and testing). The specific information you enter here will differ, but the initial command is always the same:
matthew@wolfram~$: juju bootstrap
The first time this is run, it creates a file,
~/.juju/environments/yaml, which looks something like the following:
default: sampleenvironments: sample: type: ec2 control-bucket: juju-faefb490d69a41f0a3616a4808e0766b admin-secret: ...