[ Thanks to Dmitri
Popov for this link. ]
“Want to install the new LibreOffice on Ubuntu or a
Debian-based distribution? Although the Document Foundation doesn’t
yet offer .deb binaries for these distros, you can use the provided
.rpm packages to install LibreOffice on a machine running Ubuntu or
Debian. To do this, you need to convert .rpm packages to .deb using
the alien tool. To install alien on Ubuntu, run the sudo apt-get
install alien command. Grab then the latest release of LibreOffice
from the project’s Web site, unpack the downloaded .tar.gz archive,
rename the resulting directory to libreoffice, and move it into
your home directory. Launch the terminal, and switch to the RPMS
directory and use alien to convert all .rpm packages in the
directory:”