centos 网络yum源安装

1.下载 repo文件
wget –P http://mirrors.163.com/.help/CentOS6-Base-163.repo

2.拷贝到/etc/yum.repo/ 目录下面
cp -rf CentOS6-Base-163.repo /etc/yum.repo/

3. 执行yum源更新

[root@localhost ~]# yum clean all #清除以前使用yum缓存

[root@localhost ~]# yum makecache #建立一个新的缓存，以后方便在缓存中搜索到

排错：这是我遇到的一个问题报错
问题提示yum被锁定：
Loaded plugins: fastestmirror, langpacks

Existing lock /var/run/yum.pid: another copy is running as pid 3972.

Another app is currently holding the yum lock; waiting for it to exit…

The other application is: PackageKit

Memory :  40 M RSS (920 MB VSZ)

Started: Sun Oct 16 12:01:11 2016 - 01:07 ago

State  : Sleeping, pid: 3972

Another app is currently holding the yum lock; waiting for it to exit…

解决方式：是删除yum.pid即可
rm -r /var/run/yum.pid
然后执行： yum clean all 成功了