Ubuntu - Update Libreoffice

The "stock" version of libreoffice that comes with ubuntu 12.04 is version 3.5 and Ubuntu 14.04 is 4.2.8.2. The commands below will install a later stable version.

sudo add-apt-repository ppa:libreoffice/libreoffice-4-4 -y
sudo apt-get update
sudo apt-get upgrade -y

Once that is finished, if you open up the Writer program and click Help->About to find out which version you have installed.

References

Ask Ubuntu - How do I install LibreOffice 4?
Is there a PPA with the latest version of LibreOffice?