配置額外的yum源

轉載于http://blog.csdn.net/wulantian/article/details/17161231，作為自己的學習筆記

本文章介紹的yum源支援的版本是CentOS 6系列，理論上支援RHEL6系列。

更新方法如下：

先進入yum源配置目錄

cd /etc/yum.repos.d

備份系統自帶的yum源

mv CentOS-Base.repo CentOS-Base.repo.save

下載下傳其他更快的yum源

中科大的yum源：

wget http://centos.ustc.edu.cn/CentOS-Base.repo

163的yum源：

wget http://mirrors.163.com/.help/CentOS-Base-163.repo

sohu的yum源

wget http://mirrors.sohu.com/help/CentOS-Base-sohu.repo

更新完yum源後，建議更新一下，使操作立即生效

yum makecache

[yasi]:

在執行最後一步，即yum makecache的時候，遇到錯誤：

Loaded plugins: fastestmirror Repository base is listed more than once in the configuration Repository updates is listed more than once in the configuration Repository extras is listed more than once in the configuration Repository centosplus is listed more than once in the configuration Repository contrib is listed more than once in the configuration Loading mirror speeds from cached hostfile * addons: mirrors.163.com * base: mirror.metrocast.net * extras: mirror.beyondhosting.net * fasttrack: centos.vipernetworksystems.com * updates: centos.vipernetworksystems.com http://mirrors.163.com/centos/6/addons/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404" Trying other mirror. http://mirror.centos.org/centos/6/addons/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404" Error: Cannot retrieve repository metadata (repomd.xml) for repository: addons. Please verify its path and try again

原因是，http://mirrors.163.com/centos/6/addons/x86_64/repodata/repomd.xml和http://mirror.centos.org/centos/6/addons/x86_64/repodata/repomd.xml 确實不存在，可能被更新掉了。解決辦法是，找到可用的URL替換之，或者把相應的.repo檔案中的項整個注釋掉。這裡我采用後者。

[root@wwn104 yum.repos.d]# vi CentOS-Media.repo

 把enabled=1  改成 enabled=0

然後再修改：你所有采用的源，例如我采用的是sohu 的，就修改sohu的：

[root@wwn104 yum.repos.d]# vi CentOS-Base-sohu.repo

在[addons] 下面添加：

enabled=0

然後，再執行yum makecache。之後，yum就可以找到我要安裝的包了，比如gdb, subversion, gcc-c++ 等。

注意：

有時用yum list xxx找不到某個包，可用嘗試用yum search xxx。

如，yum list vim 就報告 Error: No matching Packages to list。而 yum search vim 則傳回：

vim-X11.x86_64 : The VIM version of the vi editor for the X Window System vim-common.x86_64 : The common files needed by any version of the VIM editor vim-enhanced.x86_64 : A version of the VIM editor which includes recent enhancements vim-minimal.x86_64 : A minimal version of the VIM editor