I have a folder with a lot of e-books and I want them to be organized in different categories both logically and visually. What I mean is to provide both a good way to access what I need easily and customize the folder so to have different "areas" under different tags. Is there any software that can make a folder organized in that way so to be able find my e-books and generally files easily?
Calibre is a great ebook management tool. You can install it using -
sudo apt-get install calibre
Calibre manages your e-book collection for you. It is designed around the concept of the logical book, i.e., a single entry in your library that may correspond to actual e-book files in several formats.
Calibre can sort the books in your library by: Title, Author, Date added, Date published, Size, Rating, Series, etc.
In addition, it supports extra searchable metadata:
Tags: A flexible system for categorizing your collection however you like Comments: A long form entry that you can use for book description, notes, reviews, etc.
You can easily search your book collection for a particular book. calibre supports searching any and all of the fields mentioned above. You can construct advanced search queries by clicking the helpful "Advanced search" button to the left of the search bar.
You can export arbitrary subsets of your collection to your hard disk arranged in a fully customizable folder structure.
Finally, calibre will even go out onto the internet to find book metadata based on existing title/author or ISBN information. It can download various types of metadata and covers for your books, automatically. The metadata system is written using plugins so that different types of metadata sources can be supported in the future.
You can have a look at the other features here.