Is it possible that upgrade which failed during installation delete mongodb and their databases? I can't find data folder (help says that data folder is MongoDb folder). May failed upgrade delete all my courses created by Adapt Authoring tool? I read that maybe gnome could be reason that Ubuntu doesn't boot at all? I'm not Ubuntu expert and now I have realy problem to start Adapt on my virtual amchine which is running on oVirt environment (Adapt worked on ubuntu version 14.04 .).

Where can I get more information to solve my problem?