Licensing：This article is licensed under CC-BY-NC-SA 3.0 unported license。
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The press announcement of the Document Foundation:
http://www.documentfoundation.org/contact/tdf_release.html

To download the .deb package for the installation in Ubuntu here (It’s still beta version right now.):
http://download.documentfoundation.org/libreoffice/testing/LO_3.3.0-beta1_Linux_x86_install-deb_en-US.tar.gz.mirrorlist

Install all the .debs from the DEBS and DEBS/desktop-integration folders. Use the following command in the terminal:

sudo dpkg -i *.deb

Congratulation!