Important: The contents of Personal Package Archives are not checked or monitored. You install software from them at your own risk. This PPA is maintained by the Ubuntu Git Maintainers team. https://launchpad.net/~git-core/+archive/ppa
$ sudo add-apt-repository ppa:git-core/ppa If you get a sudo: add-apt-repository: command not found error, then you need to run
$ sudo apt-get install python-software-properties
$ sudo apt-get update
$ sudo apt-get upgrade