第一步，先安装 yum-utils
sudo yum install yum-utils第二步，创建nginx.repo文件，创建路径/etc/yum.repos.d/nginx.repo，把下列语句写入nginx.repo 文件
[nginx-stable]
name=nginx stable repo
baseurl=http://nginx.org/packages/centos/$releasever/$basearch/
gpgcheck=1
enabled=1
gpgkey=https://nginx.org/keys/nginx_signing.key
module_hotfixes=true
[nginx-mainline]
name=nginx mainline repo
baseurl=http://nginx.org/packages/mainline/centos/$releasever/$basearch/
gpgcheck=1
enabled=0
gpgkey=https://nginx.org/keys/nginx_signing.key
module_hotfixes=true如果要配置主链接仓库，请执行下列语句，默认是[nginx-stable]
sudo yum-config-manager --enable nginx-mainline第三步，安装nginx，执行下列语句
sudo yum install nginx
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