由于非得使用4.7的版本，所以找了一大圈，终于发现了一个能用的源：

更新方法如下：

vi /etc/yum.repos.d/CentOS-Base.repo

内容如下：

[base]

name=CentOS-$releasever - Base

#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os

#baseurl=http://mirror.centos.org/centos/$releasever/addons/$basearch/

baseurl=http://mirrors.usc.edu/pub/linux/distributions/centos/4.8/os/$basearch/

gpgcheck=1

#gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos4

gpgkey=http://mirrors.usc.edu/pub/linux/distributions/centos/RPM-GPG-KEY-centos4

priority=1

protect=1

#released updates

[update]

name=CentOS-$releasever - Updates

#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates

baseurl=http://mirrors.usc.edu/pub/linux/distributions/centos/4.8/updates/$basearch/

gpgcheck=1

gpgkey=http://mirrors.usc.edu/pub/linux/distributions/centos/RPM-GPG-KEY-centos4

priority=1

protect=1

#packages used/produced in the build but not released

[addons]

name=CentOS-$releasever - Addons

#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=addons

baseurl=http://mirrors.usc.edu/pub/linux/distributions/centos/4.8/addons/$basearch/

gpgcheck=1

gpgkey=http://mirrors.usc.edu/pub/linux/distributions/centos/RPM-GPG-KEY-centos4

priority=1

protect=1

#additional packages that may be useful

[extras]

name=CentOS-$releasever - Extras

#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras

baseurl=http://mirrors.usc.edu/pub/linux/distributions/centos/4.8/extras/$basearch/

gpgcheck=1

gpgkey=http://mirrors.usc.edu/pub/linux/distributions/centos/RPM-GPG-KEY-centos4

priority=1

protect=1

#additional packages that extend functionality of existing packages

[centosplus]

name=CentOS-$releasever - Plus

#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus

baseurl=http://mirrors.usc.edu/pub/linux/distributions/centos/4.8/centosplus/$basearch/

gpgcheck=1

enabled=0

gpgkey=http://mirrors.usc.edu/pub/linux/distributions/centos/RPM-GPG-KEY-centos4

priority=2

protect=1

#contrib - packages by Centos Users

[contrib]

name=CentOS-$releasever - Contrib

#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=contrib

baseurl=http://mirrors.usc.edu/pub/linux/distributions/centos/4.8/contrib/$basearch/

gpgcheck=1

enabled=0

gpgkey=http://mirrors.usc.edu/pub/linux/distributions/centos/RPM-GPG-KEY-centos4

priority=2

protect=1

 

接下来，导入key

rpm --import

yum upgrade

[root@localhost yum.repos.d]# yum upgrade

base                               100% |=========================| 1.1 kB    00:00    

primary.xml.gz            100% |=========================| 856 kB    00:07    

base      : ################################################## 2458/2458

updates                         100% |=========================| 951 B    00:00    

primary.xml.gz            100% |=========================| 129 kB    00:02    

updates   : ################################################## 324/324

addons                           100% |=========================| 951 B    00:00    

primary.xml.gz            100% |=========================| 157 B    00:00    

extras                           100% |=========================| 1.1 kB    00:00    

primary.xml.gz            100% |=========================| 74 kB    00:02    

extras    : ################################################## 244/244

yum update

OK，到此为止，大功告成！！！！！！！！