https://skyao.gitbooks.io/learning-git/installation/ubuntu1604.html
sudo add-apt-repository ppa:git-core/ppasudo apt-get updatesudo apt-get install git
sudo add-apt-repository ppa:git-core/ppa
sudo apt-get update
sudo apt-get install git
https://skyao.gitbooks.io/leaning-gitbook/installation/gitbook.html