If you don't already have a Github account, make sure to register. It will come in handy for the future.

Replace my name and email address in the following steps with the ones you used for your Github account.

git config --global color.ui true
git config --global user.name "YOUR NAME"
git config --global user.email "[email protected]"
ssh-keygen -t rsa -b 4096 -C "[email protected]"

To remove just git package itself from Ubuntu 14.04 execute on terminal:

$ sudo apt-get remove git

To remove the git package and any other dependant package which are no longer needed from Ubuntu Trusty.

$ sudo apt-get remove --auto-remove git