Redhat6.5 配置使用centos的yum源
新安裝了redhat6.5.安裝後，登入系統，使用yum update 更新系統。提示：
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
無法更新。
redhat 預設自帶的 yum 源需要註冊，才能更新。我們想不花錢也可以更新，需要替換掉redhat的yum源。
1.檢查是否安裝yum包
檢視RHEL是否安裝了yum，若是安裝了，那麼又有哪些yum包：
[[email protected] ~]# rpm -qa |grep yum
yum-metadata-parser-1.0-8.fc6
yum-3.0.1-5.el5
yum-rhn-plugin-0.4.3-1.el5
yum-updatesd-3.0.1-5.el5
2 刪除redhat自帶的yum包
解除安裝上面顯示的所有yum包：
[[email protected] ~]# rpm -qa|grep yum|xargs rpm -e --nodeps（不檢查依賴，直接刪除rpm包）
再用
[[email protected] ~]# rpm -qa |grep yum
[[email protected] ~]#
檢視，無資訊顯示錶示已經解除安裝完成。
3.下載新的yum包。使用Centos6.5的yum包
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# wget http://mirrors.163.com/centos/6.5/os/i386/Packages/yum-metadata-parser-1.1.2-16.el6.i686.rpm
# wget http://mirrors.163.com/centos/6.5/os/i386/Packages/yum-3.2.29-40.el6.centos.noarch.rpm
# wget http://mirrors.163.com/centos/6.5/os/i386/Packages/yum-plugin-fastestmirror-1.1.30-14.el6.noarch.rpm |
安裝yum軟體包
注意:單個的安裝包可能會依賴其它包（例如yum和yum-fastestmirror會相互依賴），所以我們可以把所有這些包放在一起，用一行命令將它們同時安裝即可：
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# rpm -ivh yum-metadata-parser-1.1.2-16.el6.i686.rpm yum-3.2.29-40.el6.centos.noarch.rpm yum-plugin-fastestmirror-1.1.30-14.el6.noarch.rpm
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4.更換yum源。使用163的源
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# cd /etc/yum.repos.d/
# wget http://mirrors.163.com/.help/CentOS6-Base-163.repo
# vi CentOS6-Base-163.repo
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編輯檔案，把檔案裡面的$releasever全部替換為版本號，即6.5 最後儲存！或者直接把下面的記憶體拷貝到CentOS6-Base-163.repo檔案中即可（已經修改好）
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# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client. You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#
[base]
name=CentOS-6.5 - Base - 163.com
baseurl=http://mirrors.163.com/centos/6.5/os/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6.5&arch=$basearch&repo=os
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6
#released updates
[updates]
name=CentOS-6.5 - Updates - 163.com
baseurl=http://mirrors.163.com/centos/6.5/updates/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6.5&arch=$basearch&repo=updates
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6
#additional packages that may be useful
[extras]
name=CentOS-6.5 - Extras - 163.com
baseurl=http://mirrors.163.com/centos/6.5/extras/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6.5&arch=$basearch&repo=extras
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-6.5 - Plus - 163.com
baseurl=http://mirrors.163.com/centos/6.5/centosplus/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6.5&arch=$basearch&repo=centosplus
gpgcheck=1
enabled=0
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6
#contrib - packages by Centos Users
[contrib]
name=CentOS-6.5 - Contrib - 163.com
baseurl=http://mirrors.163.com/centos/6.5/contrib/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6.5&arch=$basearch&repo=contrib
gpgcheck=1
enabled=0
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6
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5.清除原有快取
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# yum clean all
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重建快取，以提高搜尋安裝軟體的速度
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# yum makecache
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6.更新系統
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# yum update
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