本日记记录都是经常用到但是记不住，总是来回到网络上搜集的内容。日记中的有些内容是复制粘贴来的，如果认为是侵权，请联系我。
1. Windows
到官网下载安装程序进行安装。不建议到其他的下载网站下载，避免安装了你并想要但又不好清理的东西。
Git官方下载网址 https://git-scm.com/downloads
2. CentOs
CentOs有三种安装Git的方法，各有利弊。
2.1 默认安装
yum install git
通过这样的方法安装的Git版本较低，应该是1.7
2.2 源程序安装
1.安装依赖
Git 的工作需要调用 curl，zlib，openssl，expat，libiconv 等库的代码，所以需要先安装这些依赖工具
方法1：
1-1.
yum install curl-devel expat-devel gettext-devel openssl-devel zlib-devel gcc perl-ExtUtils-MakeMaker
1-1（2）
yum install curl-devel expat-devel gettext-devel openssl-devel zlib-devel asciidoc
yum install gcc perl-ExtUtils-MakeMaker
方法2：
yum install curl-devel expat-devel gettext-devel \ openssl-devel zlib-devel
2.删除当前版本
yum remove git
3-1.跳转到指定的安装目录
cd /usr/src
3-2.下载 git 安装包
wget https://www.kernel.org/pub/software/scm/git/git-2.8.3.tar.gz --no-check-certificate
3-3.解压 git 安装包
tar -zxvf git-2.8.3.tar.gz
3-4.跳转解压文件
cd git-2.8.3
3-5.配置安装路径
./configure prefix=/usr/local/git/
3-6.编译并安装
make && make install
3-7.编辑环境变量
vi /etc/profile
最后添加一行
export PATH=$PATH:/usr/local/git/bin
另一个方法
echo "export PATH=$PATH:/usr/local/git/bin" >> /etc/profile
3-8.启动这个配置文件
source /etc/profile
4.查看版本号
git --version
2.3 通过IUS安装
安装IUS的资源包：参照官网 https://ius.io/setup
Setup
To enable the IUS repository on your system, install the ius-release package. This package contains the IUS repository configuration and public package signing keys. Many IUS packages have dependencies from the EPEL repository, so install the epel-release package as well.
RHEL/CentOS 6
yum install \
https://repo.ius.io/ius-release-el6.rpm \
https://dl.fedoraproject.org/pub/epel/epel-release-latest-6.noarch.rpm
RHEL/CentOS 7
yum install \
https://repo.ius.io/ius-release-el7.rpm \
https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
Testing
IUS packages are first made available in the ius-testing repository before being promoted to the main repository. When you install ius-release, the ius-testing repository is disabled by default. Enable it if you would like to participate in testing new IUS packages.
yum install yum-utils
yum-config-manager --enable ius-testing
.输入yum repolist命令，查看ius/x86_64是否安装成功
输入yum provides git，查看提供的Git版本
安装提供中的版本 yum install git222
查看安装后的最新版本git --version