CentOSyum不能用

 　　修改/etc/yum.repos.d/Centos-Base.repo

　　# 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 - 163.com

　　baseurl=http://mirrors.163.com/centos/$releasever/os/$basearch/

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

　　gpgcheck=1

　　gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

　　#released updates

　　[updates]

　　name=CentOS-$releasever - Updates - 163.com

　　baseurl=http://mirrors.163.com/centos/$releasever/updates/$basearch/

　　#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$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-$releasever - Extras - 163.com

　　baseurl=http://mirrors.163.com/centos/$releasever/extras/$basearch/

　　#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$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-$releasever - Plus - 163.com

　　baseurl=http://mirrors.163.com/centos/$releasever/centosplus/$basearch/

　　#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$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-$releasever - Contrib - 163.com

　　baseurl=http://mirrors.163.com/centos/$releasever/contrib/$basearch/

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

　　gpgcheck=1

　　enabled=0

　　gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

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　　centos /etc/yum.repo.d/中.repo源的配置與編寫詳解

　　# 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] //唯一標識的名稱

　　name=CentOS-$releasever - Base //所使用的.repo檔案的名字

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

　　#mirrorlist 是由 yum 程式自行去捉映射月台， baseurl 則是指定固定的一個容器網址

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

　　#其中url支援的協議有 http:// ftp:// file://三種。baseurl後可以跟多個url，你可以自己改為速度比較快的鏡像站，但baseurl只能有一個

　　gpgcheck=1 #gpg簽名檢查

　　gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5

　　#gpg密鑰的位置，應指定原生密鑰檔案只有可以與伺服器上的密鑰進行校正。

　　#released updates

　　#該段指向的路徑是軟體升級時需要的軟體包

　　[updates]

　　name=CentOS-$releasever - Updates

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

　　//該路徑對應伺服器上的update檔案夾，即自動到伺服器updates檔案夾裡找軟體包

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

　　gpgcheck=1

　　gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5

　　#packages used/produced in the build but not released

　　#該段指向的路徑是已經使用了或者已經製作出來的軟體，但並沒有發行

　　[addons]

　　name=CentOS-$releasever - Addons

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

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

　　gpgcheck=1

　　gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5

　　#additional packages that may be useful

　　#該段指向的路徑是可能有用的其他的軟體

　　[extras]

　　name=CentOS-$releasever - Extras

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

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

　　gpgcheck=1

　　gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5

　　#additional packages that extend functionality of existing packages

　　#該段指向的路徑是已經存在的軟體的擴充軟體、外掛程式等等

　　[centosplus]

　　name=CentOS-$releasever - Plus

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

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

　　gpgcheck=1

　　enabled=0 #enabled=0表示這個源停用 如果enabled不寫 表示enabled=1

　　gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5

　　#contrib - packages by Centos Users

　　#該段指向的路徑是系統使用者所貢獻的軟體

　　[contrib]

　　name=CentOS-$releasever - Contrib

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

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

　　gpgcheck=1

　　enabled=0

　　gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5