Kindle and Fire tablets support a wide range of different file formats, such as PDF, EPUB, and KDP, but the preferred file format is MOBI, which the format I’ll be using in this tutorial. File Formats for Kindle, Kindle Fire and Amazon Fire Tablets To upgrade your version of Calibre, simply follow the current installation instructions on their website. If you get an error about an untrusted certificate, try this instead: sudo -v & wget -no-check-certificate -nv -O- | sudo sh /dev/stdin The best way to do this is at the terminal: sudo -v & wget -nv -O- | sudo sh /dev/stdin

Instead, download and install the latest version of Calibre from the developer’s website. The creators of Calibre recommend that you don’t install the version of Calibre that comes with your Linux distro. I own a 7th Generation Amazon Fire Tablet, which I used for this tutorial. When you’re working in Linux, it’s one of the best programs you can possibly use to convert ebooks for viewing on the Kindle, Kindle Fire or Amazon Fire Tablet. Calibre is a great free and open source management program for reading, editing and converting ebooks.

How to use calibre app