Centosyum can't be used.

Modify/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, are updated to and

# Geographically close to the client. You are should use this for CentOS updates

# Unless you are manually picking the other mirrors.

#

# If The mirrorlist= does not work for your, 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 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/. The configuration and compilation of repo source

# Centos-base.repo

#

# The Mirror system uses the connecting IP address of the client and the

# Update status of each mirror to pick mirrors, are updated to and

# Geographically close to the client. You are should use this for CentOS updates

# Unless you are manually picking the other mirrors.

#

# If The mirrorlist= does not work for your, as a fall back you can try the

# remarked out Baseurl= line instead.

#

#

Name of [base]/Unique ID

name=centos-$releasever-base//The name of the. Repo file used

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

#mirrorlist is the Yum program to capture the mapping platform, BaseURL is designated a fixed container URL

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

#其中url支持的协议有 http://ftp://file://three species. BaseURL can be followed by multiple URLs, you can change yourself to a faster mirror station, but BaseURL can only have a

Gpgcheck=1 #gpg签名检查

Gpgkey=file:///etc/pki/rpm-gpg/rpm-gpg-key-centos-5

#gpg密钥的位置, you should specify that the local key file can only be validated against the key on the server.

#released Updates

#该段指向的路径是软件升级时需要的软件包

[Updates]

name=centos-$releasever-updates

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

This path corresponds to the update folder on the server, that is, automatically to the Server updates folder to find the package

#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 builds but not released

#该段指向的路径是已经使用了或者已经制作出来的软件, but did not issue

[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 useful

#该段指向的路径是可能有用的其他的软件

[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

#该段指向的路径是已经存在的软件的扩展软件, Plug-ins, etc.

[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 indicates that the source is deactivated if enabled does not write the representation enabled=1

Gpgkey=file:///etc/pki/rpm-gpg/rpm-gpg-key-centos-5

#contrib-packages by Centos Users

#该段指向的路径是系统使用者所贡献的软件

[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