I need to upgrade from 1.0.1. I saw that this must be done incrementally. I cannot find any documentation for upgrading from 1.0.x to 1.1.x on Linux.
Is there documentation for this? If not, how should I start?
No documentation was ever created for that. All you really need to do is the database upgrade from 1.0 to 1.1, then db upgrade from 1.1 to 1.2, and finally follow the full upgrade docs from 1.2 to 1.3.
You should be able to follow the database section from 1.1 to 1.2 for the initial upgrade and just change the file names for the sql file.