Edit: Due to the fact that this article is old, the installation instructions may not work anymore. In order to successfully install the latest version of LibreOffice, please access the libreoffice tag and open the latest article (the one on top).

The latest installation instructions for LibreOffice
As you may know, LibreOffice is the most popular, open-source Office suite, available by default on some of the most popular Linux systems.
Recently, LibreOffice 5.0.4 has been released, bringing bug-fixes only.
Installation instructions:
For Ubuntu, Debian and derivative systems, the LibreOffice archive containing deb packages can be downloaded from the project’s website. Next, you need to extract the archive, cd into the extracted folder and install the debs inside.
How to install LibreOffice on 32 bit Ubuntu and Debian systems:
$ wget http://download.documentfoundation.org/libreoffice/stable/5.0.4/deb/x86/LibreOffice_5.0.4_Linux_x86_deb.tar.gz
$ tar -xzvf LibreOffice_*_Linux_x86_deb.tar.gz
$ cd LibreOffice_*_Linux_x86_deb/DEBS
$ sudo dpkg -i *.deb
How to install LibreOffice on 64 bit Ubuntu and Debian systems:
$ wget http://download.documentfoundation.org/libreoffice/stable/5.0.4/deb/x86_64/LibreOffice_5.0.4_Linux_x86-64_deb.tar.gz
$ tar -xzvf LibreOffice_*_Linux_x86-64_deb.tar.gz
$ cd LibreOffice_*_Linux_x86-64_deb/DEBS
$ sudo dpkg -i *.deb
Optional, to remove LibreOffice from Ubuntu, Debian or a derivative system, do:
$ sudo apt-get remove libreoffice*
The installation instructions should work on all the major systems using deb packages, including: Ubuntu, Linux Mint, Pinguy OS, Elementary OS, Deepin, Peppermint, LXLE, Linux Lite, Debian, SparkyLinux, Robolinux etc.