On Ubuntu's standard Unity desktop, open the Ubuntu Software Center, click the Edit menu, and select Software Sources. Click the Other Software tab and click the Add button. Type ppa:ubuntu-wine/ppa into the box and click Add Source. On Linux Mint, open the Software Manager, click Edit, select Software Sources, click the PPAs icon, and add a PPA by entering its name.
On other Ubuntu desktops, you'll want to look at your software-installation tool for a list of software sources where you can add more software. If you can't find such a graphical tool--or if you'd just rather do it from a terminal--you can open a terminal window and run the sudo add-apt-repository ppa:ubuntu-wine/ppa command. Replace ppa:ubuntu-wine/ppa with the name of the PPA.
After you add the PPA, you can install packages from it using your normal software-installation tool--for example, Ubuntu Software Center on Ubuntu's Unity desktop, Software Manager on Linux Mint, or the apt-get command in a terminal. Those packages will be updated through your desktop's normal update manager, too.
Sign up for CIO Asia eNewsletters.