is an open-source book management software, with many interesting features including e-book conversion, e-book viewer, library to ebook reader synchronization and support for the most popular eBook formats, including: epub, cbz, mobi, fb2. Being multi-platform, the app works on Linux, Windows and Mac OS X.
Source Calibre Homepage.
To install Calibre just run the one line command via your systems Terminal.
sudo -v && wget --no-check-certificate -nv -O- https://raw.githubusercontent.com/kovidgoyal/calibre/master/setup/linux-installer.py | sudo python -c "import sys; main=lambda:sys.stderr.write('Download failed\n'); exec(sys.stdin.read()); main()"
That's all EnJoY!