I installed Sushi to be able to preview files. However, when I try to preview OpenDocument files, the entire system freezes. Why do OpenDocument files do this, and are there any alternatives that do not have this issue?
Installing the unoconv converter solved the issue for me and other users
sudo apt install unoconv
This package provides a commandline utility which can convert from any document format that LibreOffice can import to any document format it can export. It uses LibreOffice's UNO bindings for non-interactive conversion of documents.
Supported document formats include Open Document format, LibreOffice Writter, MS Word, MS Office Open/MS OOXML, PDF, HTML, XHTML, RTF, DocBook, ODT, ODS, XLS and more.