安装依赖软件
# yum install curl-devel expat-devel gettext-devel openssl-devel zlib-devel asciidoc
# yum install gcc perl-ExtUtils-MakeMaker
卸载系统自带的底版本git（1.7.1）
# git --version
git version 1.7.
# yum remove git
编译安装最新的git版本
链接：https://pan.baidu.com/s/1YnhtIN4ZJmbcv4ohQ81Evg 密码：hgd4 //百度云下载地址，下载好放到/usr/local/src
cd /usr/local/src/ # tar -vxf git-2.1..tar
# cd git-2.1.
# make prefix=/usr/local/git all
# make prefix=/usr/local/git install
# echo "export PATH=$PATH:/usr/local/git/bin" >> /etc/profile
# source /etc/profile # git --version
git version git-2.1.
======================================================================
如果是非root用户使用git，则需要配置下该用户下的环境变量
$ echo "export PATH=$PATH:/usr/local/git/bin" >> ~/.bashrc
$ source ~/.bashrc
$ git --version
git version git-2.1.
可能遇到报错：utf8.c:463: undefined reference to `libiconv'
LINK git-credential-store
libgit.a(utf8.o): In function `reencode_string_iconv':
/usr/src/git-2.8./utf8.c:: undefined reference to `libiconv'
libgit.a(utf8.o): In function `reencode_string_len':
/usr/src/git-2.8./utf8.c:: undefined reference to `libiconv_open'
/usr/src/git-2.8./utf8.c:: undefined reference to `libiconv_close'
/usr/src/git-2.8./utf8.c:: undefined reference to `libiconv_open'
collect2: ld returned exit status
make: *** [git-credential-store] Error
解决如下：
一.安装libiconv
# cd /usr/local/src
# wget http://ftp.gnu.org/pub/gnu/libiconv/libiconv-1.14.tar.gz
# tar -zxvf libiconv-1.14.tar.gz
# cd libiconv-1.14
# ./configure --prefix=/usr/local/libiconv && make && make install
二.创建一个软链接到/usr/lib
# ln -s /usr/local/lib/libiconv.so /usr/lib
# ln -s /usr/local/lib/libiconv.so. /usr/lib
三.然后回到git目录继续编译
# cd /usr/local/scr/git-2.8.
# make configure
# ./configure --prefix=/usr/local --with-iconv=/usr/local/libiconv
# make
# make install
四.检查一下版本号
# git --version