解决在CentOS 5.5 yum源下载慢的办法

最近在虚拟机下面安装了个CentOS 5.5，使用yum更新时发现下载速度异常慢。可以修改yum的配置文件，把其镜像指向国内的服务器即可。

方案一：

# cd /etc/yum.repos.d/

# mv CentOS-Base.repo CentOS-Base.repo.bak

# wget http://docs.linuxtone.org/soft/lemp/CentOS-Base.repo

方案二：

手段修改CentOS-Base.repo文件，将baseurl设置成baseurl=http://ftp.sjtu.edu.cn/centos/5/addons/$basearch/

详细配置如下：

  
  
  
  

   
   
   
   [
   
   
   
   base
   
   
   
   ]
   
   
   
   

name
   
   
   
   =
   
   
   
   CentOS-
   
   
   
   5
   
   
   
   -Base

#mirrorlist
   
   
   
   =
   
   
   
   http://mirrorlist.centos.org/?release
   
   
   
   =
   
   
   
   $releasever5&arch
   
   
   
   =
   
   
   
   $basearch&repo
   
   
   
   =
   
   
   
   os

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

baseurl
   
   
   
   =
   
   
   
   http://ftp.sjtu.edu.cn/centos/
   
   
   
   5
   
   
   
   /os/$basearch/

gpgcheck
   
   
   
   =
   
   
   
   1
   
   
   
   

gpgkey
   
   
   
   =
   
   
   
   http://mirror.centos.org/centos/RPM-GPG-KEY-centos5

#released updates


   
   
   
   [
   
   
   
   update
   
   
   
   ]
   
   
   
   

name
   
   
   
   =
   
   
   
   CentOS-
   
   
   
   5
   
   
   
   -Updates

#mirrorlist
   
   
   
   =
   
   
   
   http://mirrorlist.centos.org/?release
   
   
   
   =
   
   
   
   4
   
   
   
   &arch
   
   
   
   =
   
   
   
   $basearch&repo
   
   
   
   =
   
   
   
   updates

baseurl
   
   
   
   =
   
   
   
   http://ftp.sjtu.edu.cn/centos/
   
   
   
   5
   
   
   
   /updates/$basearch/

gpgcheck
   
   
   
   =
   
   
   
   1
   
   
   
   

gpgkey
   
   
   
   =
   
   
   
   http://mirror.centos.org/centos/RPM-GPG-KEY-centos5

#packages used/produced in the build but not released


   
   
   
   [
   
   
   
   addons
   
   
   
   ]
   
   
   
   

name
   
   
   
   =
   
   
   
   CentOS-
   
   
   
   5
   
   
   
   -Addons

#mirrorlist
   
   
   
   =
   
   
   
   http://mirrorlist.centos.org/?release
   
   
   
   =
   
   
   
   4
   
   
   
   &arch
   
   
   
   =
   
   
   
   $basearch&repo
   
   
   
   =
   
   
   
   addons

baseurl
   
   
   
   =
   
   
   
   http://ftp.sjtu.edu.cn/centos/
   
   
   
   5
   
   
   
   /addons/$basearch/

gpgcheck
   
   
   
   =
   
   
   
   1
   
   
   
   

gpgkey
   
   
   
   =
   
   
   
   http://mirror.centos.org/centos/RPM-GPG-KEY-centos5

#additional packages that may be useful


   
   
   
   [
   
   
   
   extras
   
   
   
   ]
   
   
   
   

name
   
   
   
   =
   
   
   
   CentOS-
   
   
   
   5
   
   
   
   -Extras

#mirrorlist
   
   
   
   =
   
   
   
   http://mirrorlist.centos.org/?release
   
   
   
   =
   
   
   
   4
   
   
   
   &arch
   
   
   
   =
   
   
   
   $basearch&repo
   
   
   
   =
   
   
   
   extras

baseurl
   
   
   
   =
   
   
   
   http://ftp.sjtu.edu.cn/centos/
   
   
   
   5
   
   
   
   /extras/$basearch/

gpgcheck
   
   
   
   =
   
   
   
   1
   
   
   
   

gpgkey
   
   
   
   =
   
   
   
   http://mirror.centos.org/centos/RPM-GPG-KEY-centos5

#additional packages that extend functionality of existing packages


   
   
   
   [
   
   
   
   centosplus
   
   
   
   ]
   
   
   
   

name
   
   
   
   =
   
   
   
   CentOS-
   
   
   
   5
   
   
   
   -Plus

#mirrorlist
   
   
   
   =
   
   
   
   http://mirrorlist.centos.org/?release
   
   
   
   =
   
   
   
   4
   
   
   
   &arch
   
   
   
   =
   
   
   
   $basearch&repo
   
   
   
   =
   
   
   
   centosplus

baseurl
   
   
   
   =
   
   
   
   http://ftp.sjtu.edu.cn/centos/
   
   
   
   5
   
   
   
   /centosplus/$basearch/

gpgcheck
   
   
   
   =
   
   
   
   1
   
   
   
   

enabled
   
   
   
   =
   
   
   
   0
   
   
   
   

gpgkey
   
   
   
   =
   
   
   
   http://mirror.centos.org/centos/RPM-GPG-KEY-centos5

#contrib – packages by Centos Users


   
   
   
   [
   
   
   
   contrib
   
   
   
   ]
   
   
   
   

name
   
   
   
   =
   
   
   
   CentOS-
   
   
   
   5
   
   
   
   -Contrib

#mirrorlist
   
   
   
   =
   
   
   
   http://mirrorlist.centos.org/?release
   
   
   
   =
   
   
   
   4
   
   
   
   &arch
   
   
   
   =
   
   
   
   $basearch&repo
   
   
   
   =
   
   
   
   contrib

baseurl
   
   
   
   =
   
   
   
   http://ftp.sjtu.edu.cn/centos/
   
   
   
   5
   
   
   
   /contrib/$basearch/

gpgcheck
   
   
   
   =
   
   
   
   1
   
   
   
   

enabled
   
   
   
   =
   
   
   
   0
   
   
   
   

gpgkey
   
   
   
   =
   
   
   
   http://mirror.centos.org/centos/RPM-GPG-KEY-centos5
  
  
  
  

导入 key

＃ rpm –import http://ftp.sjtu.edu.cn/centos/5/os/i386/RPM-GPG-KEY-CentOS-5

运行，测试

＃ yum update  

全部删除临时文件

#yum clean all