## Add Ubuntu PPA to Debian system

First, locate the PPA for your package on [Launchpad](https://launchpad.net/). Open the "Technical details about this PPA" section of the repository's page. 
Copy the `sources.list` entry from the page into a file in `/etc/apt/sources.list.d/`. Next, locate the "Fingerprint" field on the page, and on the command line, enter:
```
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys ${fingerprint:?}
```