一，下载yum的repo文件：
yum -y install wget
cd /etc/yum.repos.d/
wget http://mirrors.sohu.com/help/CentOS-Base-sohu.repo
二，将其他的配置文件改名设置备份
mv CentOS-Base.repo CentOS-Base.repo.bak
三，测试yum源可用性
yum list | wc -l
显示5313个包即为配置正确
配置sohu的网络yum源常见报错：
一，路径错误：
[[email protected] ~]# yum list | wc -l
http://mirrors.sohu.com/centos/6/addons/i386/repodata/repomd.xml: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404 Not Found"
Trying other mirror.
http://ftp.jaist.ac.jp/pub/Linux/CentOS/6/addons/i386/repodata/repomd.xml: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404 Not Found"
Trying other mirror.
解析：
此为配置路径错误
解决办法：
cd /etc/yum.repos.d/
vim CentOS-Base-sohu.repo
找到addons修改为os即可
然后执行
yum makecache
问题解决。
二，进程占用
[[email protected] yum.repos.d]# yum clean all
Loaded plugins: fastestmirror
Existing lock /var/run/yum.pid: another copy is running as pid 1224.
Another app is currently holding the yum lock; waiting for it to exit...
The other application is: yum
Memory : 14 M RSS (142 MB VSZ)
Started: Tue Jul 19 19:41:24 2016 - 00:12 ago
State : Traced/Stopped, pid: 1224
Another app is currently holding the yum lock; waiting for it to exit...
The other application is: yum
Memory : 14 M RSS (142 MB VSZ)
Started: Tue Jul 19 19:41:24 2016 - 00:14 ago
State : Traced/Stopped, pid: 1224
^Z
解决办法：
使用kill -9 强制杀死对应进程
kill -9 1224
问题解决