First step would be to install bzr.

Open up a terminal and type:

'''sudo aptitude install bzr'''

Now we should make sure bzr knows who we are:

'''bzr whoami "Your Name <your@email>"'''

'''bzr launchpad-login USERNAME'''

To interact with launchpad in any way, you must have an account and a SSH key registered, so make sure you have both.

Next you would need to register a product.

Once you have all of those steps covered, you have to create a repository of what you want to upload, so go to the directory where all the files are:

'''cd project_dir'''

and then create the initial local repository:

'''bzr init'''

'''bzr add''' (this adds all the files in the directory, see bazaar documentation to exclude files or directories)

'''bzr commit -m "first commit"'''


Your local bzr repository is now ready to be sent to launchpad.

You would do this with:

'''bzr push lp:~launchpad_user_or_team/project_name/branch'''


Your project is now hosted on Launchpad. Keep in mind it might take a few minutes after the push is done succesfully for everything to work correctly.

Any user who wants to work on the project has two different approaches:

Checkouts: Usually recommended for quick changes, it commits straight into Launchpad

'''bzr checkout lp:~launchpad_user_or_team/project_name/branch'''


Branches: For bigger changes, it commits locally and you push the changes to Launchpad when ready

'''bzr branch lp:~launchpad_user_or_team/project_name/branch'''


Whenever making changes to the files, both approaches need a:

'''bzr commit -m "a comment on what has been changed"'''


But when using branches, you also need send your changes:

'''bzr push lp:~launchpad_user_or_team/project_name/branch'''


More information on bzr:

http://bazaar-vcs.org/Tutorials/CentralizedWorkflow
http://blogs.gnome.org/view/jamesh/2006/08/17/1