Juju changed the subcommands on the major release boundary. These documents are a summary of Juju commands for the major releases. For more detailed information please refer to the official documentation.
Remember you can always juju help and then any of these subcommands to get the
help for the specific command.
The 1.x Juju cheatsheet covers the original Juju subcommands.
The 2.x Juju cheatsheet covers the new Juju subcommands.
The 2.x charm-tools cheatsheet covers the charm subcommands.