step1:下載安裝包
#wget https://mirrors.edge.kernel.org/pub/software/scm/git/git-2.9.5.tar.gz
step2:解壓安裝包
# tar -zxf git-2.9.5.tar.gz
step3:安裝
# cd git-2.9.5
# make prefix=/usr/local all
# sudo make prefix=/usr/local install
step4:驗證是否安裝成功
# git --version
git version 2.9.5