树莓派centos7(armhf) yum源（中国科学技术大学）

个人感觉centos系统要比 Raspbian好用，所以在自己的树莓派上折腾了个centos系统，但装上之后发现网络上找不到国内的yum源，能找到的都不是armhf的，都是x86_x64的，最后发现中科大的源里面文件目录上是有armhf的，但是找不到可下载的文件，所以只能自己动手改了。。。

更改后的yum源文件的内容如下：

# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client.  You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#
 
[base]
name=CentOS-$releasever - Base
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
baseurl=http://mirrors.ustc.edu.cn/centos-altarch/$releasever/os/$basearch/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
       file://