由于直接使用yum 安装安装1.7版本的旧git，github要求1.8.3 以上
git是用ruby编写的，所以应该要安装ruby，采用源码安装
配置源
cd /etc/yum.repo/
mkdir bak
mv * ./bak
#配置163的源
curl -L http://mirrors.163.com/.help/CentOS6-Base-163.repo > CentOS6-Base-163.repo
#配置epel的源
rpm -ivh http://mirrors.ustc.edu.cn/epel/6/x86_64/epel-release-6-8.noarch.rpm
#更新一下包
yum update
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安装依赖
yum install ruby
yum install gcc
yum install gcc-g++
yum install make
yum install libffi-devel
yum install openssl-devel.x86_64
yum install python-devel
yum install vim
yum install curl-devel
yum install perl-ExtUtils-MakeMaker.x86_64
yum install tcl tk
yum install gettext
yum install asciidoc
yum install xmlto
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编译安装
#下载解压
curl -O https://www.kernel.org/pub/software/scm/git/git-2.0.0.tar.gz
tar -zxvf git-2.0.0.tar.gz
cd git-2.0.0
make configure ;# as yourself
./configure --prefix=/usr ;# as yourself
make all doc ;# as yourself
make install install-doc install-html;# as root
