因为redhat中的yum是收费的，未注册时不允许使用的，下面是挂载光盘后的情况，未挂载是没有yum命令。但是下面即便挂载了也是需要验证的

[root@localhost /]# yum install openssl

Loaded plugins: product-id, refresh-packagekit, security, subscription-manager

Updating certificate-based repositories.

Unable to read consumer identity

Setting up Install Process

Nothing to do

所以最好是去使用centos的yum源，免费的。

推文：https://blog.csdn.net/yingfengjia520/article/details/54866007

推文：RedHat6使用CentOS yum源 换yum

安装步骤：

一：查看原来的yum源，删除原有yum源

rpm -aq | grep yum    #查看

rpm -aq | grep yum|xargs rpm -e --nodeps    #删除

二：下载centos的yum安装包

这里使用网易的yum源即可，快些

http://mirrors.163.com/centos/6/os/x86_64/Packages/　　#修改前面的6可以修改centos版本　　注意（x86_64是64位系统，i386是32位）

安装yum源的相关依赖包

http://mirrors.163.com/centos/6/os/x86_64/Packages/python-urlgrabber-3.9.1-11.el6.noarch.rpm
http://mirrors.163.com/centos/6/os/x86_64/Packages/python-iniparse-0.3.1-2.1.el6.noarch.rpm

yum源包

http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-3.2.29-81.el6.centos.noarch.rpm
http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-metadata-parser-1.1.2-16.el6.x86_64.rpm
http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-40.el6.noarch.rpm
http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-updateonboot-1.1.30-40.el6.noarch.rpm
http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-utils-1.1.30-40.el6.noarch.rpm

注意：在上面yum源包中yum=metadata-parser是需要系统版本要求，需要64位，这里我们的系统是32位，会出现错误

error: Failed dependencies:

        libc.so.()(64bit) is needed by yum-metadata-parser-1.1.-.el6.x86_64

        libc.so.(GLIBC_2.2.5)(64bit) is needed by yum-metadata-parser-1.1.-.el6.x86_64

        libglib-2.0.so.()(64bit) is needed by yum-metadata-parser-1.1.-.el6.x86_64

        libpthread.so.()(64bit) is needed by yum-metadata-parser-1.1.-.el6.x86_64

        libpython2..so.1.0()(64bit) is needed by yum-metadata-parser-1.1.-.el6.x86_64

        libsqlite3.so.()(64bit) is needed by yum-metadata-parser-1.1.-.el6.x86_64

        libxml2.so.()(64bit) is needed by yum-metadata-parser-1.1.-.el6.x86_64

        libxml2.so.(LIBXML2_2.4.30)(64bit) is needed by yum-metadata-parser-1.1.-.el6.x86_64

错误原因：版本不符

所以我们需要再去下载一个32位的包,原来的删掉

http://mirrors.163.com/centos/6/os/i386/Packages/yum-metadata-parser-1.1.2-16.el6.i686.rpm
[root@localhost yum]# rm -rf yum-metadata-parser-1.1.-.el6.x86_64.rpm

三：上传安装包

[root@localhost yum]# ls

python-iniparse-0.3.-2.1.el6.noarch.rpm

python-urlgrabber-3.9.-.el6.noarch.rpm

yum-3.2.-.el6.centos.noarch.rpm

yum-metadata-parser-1.1.-.el6.x86_64.rpm

yum-plugin-fastestmirror-1.1.-.el6.noarch.rpm

yum-updateonboot-1.1.-.el6.noarch.rpm

yum-utils-1.1.-.el6.noarch.rpm

四：先安装python依赖包

[root@localhost yum]# rpm -ivh python-iniparse-0.3.1-2.1.el6.noarch.rpm

warning: python-iniparse-0.3.-2.1.el6.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID c105b9de: NOKEY

Preparing...                ########################################### [%]

        package python-iniparse-0.3.-2.1.el6.noarch is already installed
[root@localhost yum]# rpm -ivh python-urlgrabber-3.9.1-11.el6.noarch.rpm

warning: python-urlgrabber-3.9.-.el6.noarch.rpm: Header V3 RSA/SHA1 Signature, key ID c105b9de: NOKEY

Preparing...                ########################################### [%]

        file /usr/lib/python2./site-packages/urlgrabber/grabber.py from install of python-urlgrabber-3.9.-.el6.noarch conflicts with file from package python-urlgrabber-3.9.-.el6.noarch

        file /usr/lib/python2./site-packages/urlgrabber/grabber.pyc from install of python-urlgrabber-3.9.-.el6.noarch conflicts with file from package python-urlgrabber-3.9.-.el6.noarch

        file /usr/lib/python2./site-packages/urlgrabber/grabber.pyo from install of python-urlgrabber-3.9.-.el6.noarch conflicts with file from package python-urlgrabber-3.9.-.el6.noarch

        file /usr/lib/python2./site-packages/urlgrabber/progress.pyc from install of python-urlgrabber-3.9.-.el6.noarch conflicts with file from package python-urlgrabber-3.9.-.el6.noarch

        file /usr/lib/python2./site-packages/urlgrabber/progress.pyo from install of python-urlgrabber-3.9.-.el6.noarch conflicts with file from package python-urlgrabber-3.9.-.el6.noarch

这里发现：安装python-urlgrabber与原来的python中的插件冲突（已经安装了一个低版本的，我们要先去卸载他）

[root@localhost yum]# rpm -qa|grep python-url　　查看已安装的旧版本python-urlgrabber

python-urlgrabber-3.9.1-8.el6.noarch

[root@localhost yum]# rpm -e --nodeps python-urlgrabber-3.9.1-8.el6.noarch　　#强制卸载

[root@localhost yum]# rpm -qa|grep python-url

[root@localhost yum]#

再次去安装新的python-urlgrabber

[root@localhost yum]# rpm -ivh python-urlgrabber-3.9.-.el6.noarch.rpm

warning: python-urlgrabber-3.9.-.el6.noarch.rpm: Header V3 RSA/SHA1 Signature, key ID c105b9de: NOKEY

Preparing...                ########################################### [%]

   :python-urlgrabber      ########################################### [%]

成功！！

五：开始安装yum源

[root@localhost yum]# ls

yum-3.2.-.el6.centos.noarch.rpm

yum-metadata-parser-1.1.-.el6.i686.rpm

yum-plugin-fastestmirror-1.1.-.el6.noarch.rpm

yum-updateonboot-1.1.-.el6.noarch.rpm

yum-utils-1.1.-.el6.noarch.rpm
[root@localhost yum]# rpm -ivh yum-*

注意：有可能你之前有安装过其他的yum包，没有卸载干净，这时我们需要先去卸载掉原有的

[root@localhost yum]# rpm -qa| grep yum

yum-updateonboot-1.1.-.el6.noarch

yum-3.2.-.el6.noarch

yum-utils-1.1.-.el6.noarch

yum-rhn-plugin-0.9.-.el6.noarch

PackageKit-yum-0.5.-.el6.i686

yum-plugin-security-1.1.-.el6.noarch

yum-plugin-fastestmirror-1.1.-.el6.noarch

yum-metadata-parser-1.1.-.el6.i686

PackageKit-yum-plugin-0.5.-.el6.i686

将所有的卸载掉

[root@localhost yum]# rpm -e --nodeps yum-3.2.-.el6.noarch

[root@localhost yum]# rpm -e --nodeps yum-updateonboot-1.1.-.el6.noarch

[root@localhost yum]# rpm -e --nodeps yum-plugin-fastestmirror-1.1.-.el6.noarch

[root@localhost yum]# rpm -e --nodeps yum-metadata-parser-1.1.-.el6.i686

[root@localhost yum]# rpm -e --nodeps yum-utils-1.1.-.el6.noarch

[root@localhost yum]# rpm -e --nodeps yum-plugin-security-1.1.-.el6.noarch

[root@localhost yum]# rpm -e --nodeps PackageKit-yum-plugin-0.5.-.el6.i686

[root@localhost yum]# rpm -e --nodeps yum-rhn-plugin-0.9.-.el6.noarch

重新安装：

[root@localhost yum]# rpm -ivh yum-*

warning: yum-3.2.-.el6.centos.noarch.rpm: Header V3 RSA/SHA1 Signature, key ID c105b9de: NOKEY

Preparing...                ########################################### [%]

   :yum-metadata-parser    ########################################### [ %]

   :yum-plugin-fastestmirro########################################### [ %]

   :yum                    ########################################### [ %]

   :yum-updateonboot       ########################################### [ %]

   :yum-utils              ########################################### [%]

安装完成！！

六：修改yum的repo配置文件

[root@localhost yum]# cd /etc/yum.repos.d/

[root@localhost yum.repos.d]# ls

epel.repo  epel-testing.repo  packagekit-media.repo  rhel-source.repo

[root@localhost yum.repos.d]# rm -rf *

下载centos的repo文件，放到上面的文件夹下

[root@localhost yum.repos.d]# wget http://mirrors.163.com/.help/CentOS6-Base-163.repo  #没有网可以直接下载，再去上传
[root@localhost yum.repos.d]# ls

CentOS6-Base-.repo

修改配置文件：将baseurl中的$releasever修改为centos版本号，这里使用6既可以

# 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 - .com

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

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

gpgcheck=

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

#released updates

[updates]

name=CentOS-$releasever - Updates - .com

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

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

gpgcheck=

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

#additional packages that may be useful

[extras]

name=CentOS-$releasever - Extras - .com

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

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

gpgcheck=

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

#additional packages that extend functionality of existing packages

[centosplus]

name=CentOS-$releasever - Plus - .com

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

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

gpgcheck=

enabled=

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

#contrib - packages by Centos Users

[contrib]

name=CentOS-$releasever - Contrib - .com

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

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

gpgcheck=

enabled=

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

原来文件内容

# 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-$ - Base - .com

baseurl=http://mirrors.163.com/centos/6/os/$basearch/

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

gpgcheck=

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

#released updates

[updates]

name=CentOS-$ - Updates - .com

baseurl=http://mirrors.163.com/centos/6/updates/$basearch/

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

gpgcheck=

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

#additional packages that may be useful

[extras]

name=CentOS-$ - Extras - .com

baseurl=http://mirrors.163.com/centos/6/extras/$basearch/

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

gpgcheck=

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

#additional packages that extend functionality of existing packages

[centosplus]

name=CentOS-$ - Plus - .com

baseurl=http://mirrors.163.com/centos/6/centosplus/$basearch/

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

gpgcheck=

enabled=

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

#contrib - packages by Centos Users

[contrib]

name=CentOS-$ - Contrib - .com

baseurl=http://mirrors.163.com/centos/6/contrib/$basearch/

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

gpgcheck=

enabled=

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

修改后的文件

七：修改后的测试

yum clean all    #清空缓存
显示已安程序包及可安程序包

yum list    #需要联网

测试安装OpenSSL

[root@redhat2 yum.repos.d]# yum install openssl

Loaded plugins: fastestmirror, product-id, subscription-manager

Updating certificate-based repositories.

Unable to read consumer identity

Setting up Install Process

Loading mirror speeds from cached hostfile

Resolving Dependencies

--> Running transaction check

---> Package openssl.i686 :1.0.-.el6_2. will be updated

---> Package openssl.i686 :1.0.1e-.el6 will be an update

--> Finished Dependency Resolution

Dependencies Resolved

================================================================================================================

 Package                   Arch                   Version                          Repository              Size

================================================================================================================

Updating:

 openssl                   i686                   1.0.1e-.el6                    base                   1.5 M

Transaction Summary

================================================================================================================

Upgrade        Package(s)

Total size: 1.5 M

Is this ok [y/N]: y

Downloading Packages:

warning: rpmts_HdrFromFdno: Header V3 RSA/SHA1 Signature, key ID c105b9de: NOKEY

Retrieving key from http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

Importing GPG key 0xC105B9DE:

 Userid: "CentOS-6 Key (CentOS 6 Official Signing Key) <centos-6-key@centos.org>"

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

Is this ok [y/N]: y

Running rpm_check_debug

Running Transaction Test

Transaction Test Succeeded

Running Transaction

Warning: RPMDB altered outside of yum.

** Found  pre-existing rpmdb problem(s), 'yum check' output follows:

PackageKit-0.5.-.el6.i686 has missing requires of PackageKit-yum = ('', '0.5.8', '20.el6')

PackageKit-0.5.-.el6.i686 has missing requires of PackageKit-yum-plugin = ('', '0.5.8', '20.el6')

rhn-check-1.0.-.el6.noarch has missing requires of yum-rhn-plugin >= ('', '0.9.1', '')

  Updating   : openssl-1.0.1e-.el6.i686                                                                   /

  Cleanup    : openssl-1.0.-.el6_2..i686                                                                /

Installed products updated.

  Verifying  : openssl-1.0.1e-.el6.i686                                                                   /

  Verifying  : openssl-1.0.-.el6_2..i686                                                                / 

Updated:

  openssl.i686 :1.0.1e-.el6                                                                                  

Complete!

成功！！正确

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