Now that you have your repository, you need to keep it up to date. Any changes you make to your local copy of the code need to be registered back to the Subversion server before other developers can see it and the change can be assigned a revision tag.
Most of the time, the changes that you make to your code will simply involve changing text within an existing file. As you've seen, the svn commit command causes all of the changes in your local copy to be sent to the server. Subversion requires you to add a short message to the commit, describing the change by using the -m flag, as in svn commit -m "I fixed that really hairy bug. Hooray for me". If you don't include a descriptive message, Subversion will try to launch your system's default editor for you to type one in.
If you've lost track of the revisions you've made since your last commit, you can get a handy list by using the svn status command as follows:
$ svn status ? edge_update.sh ? soupsonline.tmproj M test/unit/ingredient_test.rb M test/functional/ingredients_controller_test.rb M test/functional/recipes_controller_test.rb M app/controllers/ingredients_controller.rb M app/views/recipes/show.html.erb ? app/views/ingredients/remote_update.html.erb M app/views/ingredients/remote_edit.html.erb ? db/schema.rb X vendor/rails ? public/images/spacer.gif ? public/images/img10.gif ? public/images/img01.gif ? public/images/img11.gif ? public/images/img02.gif ? ...