ubuntu@trusty-admin:~$ juju status
    Welcome to Juju 2.0.0. If you meant to use Juju 1.x you can continue using it
    with the command juju-1 e.g. 'juju-1 switch'.
    See https://jujucharms.com/docs/stable/introducing-2 for more details.

Since Juju 2 is being run for the first time, downloading latest cloud information.
Fetching latest public cloud list...
Your list of public clouds is up to date, see `juju clouds`.
ERROR No model in focus.

Please use "juju models" to see models available to you.
You can set current model by running "juju switch"
or specify any other model on the command line using the "-m" flag.

ubuntu@trusty-admin:~$ juju-1 switch
juju-1: command not found