yum更换国内源
1、cd /etc/yum.repos.d/
rm -f dvd.repo
wget http://mirrors.163.com/.help/CentOS7-Base-163.repo
或者
curl -O http://mirrors.163.com/.help/CentOS7-Base-163.repo
yum list
yum install epel-release-y
yum下载rpm包
只下载，不安装
sudo yum install --downloadonly <package-name>
下载源码包安装
tar xf cronolog-1.6.2.tar.gz
./configure
make
make install
本文转自 jiekegz 51CTO博客，原文链接:http://blog.51cto.com/jacksoner/1978159
