While ElementaryOS is a derivative of Ubuntu, that doesn’t always mean it functions exactly the same out of the box.

While trying to install Zotero I found that the apt package manager didn’t have the command needed to add a ppa so I could install Zotero.

To add the apt-add-repository command to ElementaryOS you need to run this command in your terminal.

sudo apt-get install software-properties-common

Once you have the common properties installed you can happily go ahead and add new ppa’s to your ElementaryOS system.