First I installed some packages (not all are required):

Then I downloaded trac from svn and installed it:

Just choose a name for your project and for small projects a local sqlite-db is fine. After this you can go on create a trac environment that can be hosted.

To get a new project at /var/www/trac the steps would be:

This would init a project with an admin user. And here my Apache config for it:

This config needs mod-python: