I have upgraded to 13.04 and lose disk space, ... I have a 3 TB hard disk, and had yesterday still 890 GB free, ... today all is gone!
Disk Usage Analyzer does not give me a clue and says that it could not read all directories due to missing permission. How can I start it as root, believing that this would give me all permissions.
Log files don't show me also anything useful for that matter.