源码安装Git
git官网下载最新版本GIT：
[root@localhost ~]# wget https://mirrors.edge.kernel.org/pub/software/scm/git/git-2.8.5.tar.gz
1.安装依赖包：
[root@localhost ~]# yum install curl-devel expat-devel gettext-devel openssl-devel zlib-devel gcc perl-ExtUtils-MakeMaker -y
注意：安装依赖时，yum自动安装了Git，需要卸载旧版本Git，命令为：
[root@localhost ~]# yum remove git
2.安装git:
[root@localhost ~]# tar -xvf git-2.8.5.tar.gz -C /usr/local
[root@localhost ~]# cd /usr/local
[root@localhost ~]# mv git-2.8.5 git
[root@localhost ~]# cd git
解压并cd到解压目录
[root@localhost ~]# make prefix=/usr/local/git all
[root@localhost ~]# make prefix=/usr/local/git install
3.修改环境变量：
[root@localhost bin]# vim /etc/profile
export PATH=$PATH:/usr/local/git/bin
[root@localhost bin]# source /etc/profile
4.测试是否安装成功：
[root@localhost ~]# git --version git version 2.8.5