備份yum源
cd /etc/yum.repos.d
mkdir repo_bak
mv *.repo repo_bak/
下載阿里雲repo文件
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
清空yum緩存並且生成新的yum緩存
yum clean all
yum makecache
安裝軟件擴展源
yum install -y epel-release
查看更換的源
yum repolist
安裝nginx
yum install nginx
啟動
systemctl start nginx
網頁查看
在瀏覽器上輸入阿里雲你自己服務器的ip地址,訪問即可,如下表示啟動成功