DVDFab is a DVD copying and ripping software for Windows. Quite easy to use, and fortunately it runs on Wine, so Linux users can enjoy it too. It is shareware program with 30 day trial period. However, in wine you can use indefinitely with this trick that I found out.
In the top bar (where you can see Close, Minimize etc buttons) there is a green round button. Pressing it open a window where there is a button to restore defaults. Press it, and then click those dialogs with OK button. Close windows, exit application. If you now start DVDFab again, you will notice that your trial period has been reseted (it starts anew).
Leaving moral implications aside, I do not see that there is nothing illegal in here. You are using normal features provided by program, there is no cracking, no key generation or anything like that. If it happens that restoring defaults also resets your trial period, so be it!
With DVDFab you can easily copy whole DVD and Bluray content on your hard disk such as it is, or shrink it to suitable size (e.g single-sided DVD). You can also rip the content into an avi or mkv file. Some of the operations might be a bit misleading, you have to look carefully. Otherwise, you might not be doing what you think you are doing. By default, copying of DVD content to disk is done by shrinking it to size of 4.2 Gb (DVD5, 1 single sided dvd). You have to change this to DVD9, so that all content is copied as it is, and not shrinked. In ripping, default is allways 1-pass, which you have to change into 2-pass, if you want quality.
All this is important if you do things like me. I usually copy whole content of DVD on hard disk, and do 2-pass ripping using the copy on hard disk. There is no point to shrink vob-files first while copying them to hard disk, and then rip that.