It was recently brought to our attention that the main PPA (Personal Package Archive) software repositories of the current stable release of the Ubuntu MATE Linux operating system have been re-organized and in order for users to receive the latest software updates, they must manually add a new PPA into their distributions.
Special thanks to Martin Wimpress, co-founder and project lead for Ubuntu MATE, for informing us about this very important change in the Ubuntu MATE 14.10 software repositories! All Ubuntu MATE 14.10 users are urged to take action immediately, in order to receive the newer MATE 1.8 desktop environment and packages.
To add the new PPA in your Ubuntu MATE 14.10 operating system, open a terminal window, and copy/paste the following lines of code, one by one, hitting the Enter key after each one:
sudo apt-get update
sudo apt-get dist-upgrade