redhat 7安装CentOS 7 yum源

http://www.bubuko.com/infodetail-2004218.html

http://www.bubuko.com/infodetail-2004218.html

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1报错信息:    参考:https://www.centos.org/forums/viewtopic.php?t=36563

[root@LinuxS04 site-packages]# yum
There was a problem importing one of the Python modules
required to run yum. The error leading to this problem was:

No module named urlgrabber

Please install a package which provides this module, or
verify that the module is installed correctly.

It's possible that the above module doesn't match the
current version of Python, which is:
2.7.5 (default, Feb 11 2014, 07:46:25)
[GCC 4.8.2 20140120 (Red Hat 4.8.2-13)]

If you cannot solve this problem yourself, please go to
the yum faq at:
  http://yum.baseurl.org/wiki/Faq
  解决办法:
[root@LinuxS04 site-packages]# rpm -qa | grep urlgrabber
python-urlgrabber-3.10-4.el7.noarch
[root@LinuxS04 site-packages]# rpm -qa python-urlgrabber-3.10-4.el7.noarch
[root@LinuxS04 site-packages]# rpm -e --nodeps  python-urlgrabber-3.10-4.el7.noarch
然后安装:
[root@LinuxS04 yum.repos.d]# rpm -ivh python-urlgrabber-3.10-8.el7.noarch.rpm
警告：python-urlgrabber-3.10-8.el7.noarch.rpm: 头V3 RSA/SHA256 Signature, 密钥 ID f4a80eb5: NOKEY
准备中...                          ################################# [100%]
正在升级/安装...
   1:python-urlgrabber-3.10-8.el7     ################################# [100%]
再运行yum即可，没有报错了。！！！！

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2，红帽7安装图形桌面报错

yum groupinstall "GNOME Desktop"

报错信息      :

错误：unbound-libs conflicts with redhat-release-server-7.0-1.el7.x86_64
错误：initscripts conflicts with redhat-release-server-7.0-1.el7.x86_64
您可以尝试添加 --skip-broken 选项来解决该问题
** 发现 1 个已存在的 RPM 数据库问题， 'yum check' 输出如下：
rhn-check-2.0.2-21.el7.noarch 有缺少的需求 yum-rhn-plugin >= ('0', '1.6.4', '1')

后经搜索：https://access.redhat.com/solutions/3423391

必须参加红帽订阅才可以安装

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https://www.cnblogs.com/haoyufeng/p/4393005.html    自己测过了，可以使用的。

1、[root@localhost ~]# rpm -qa|grep yum|xargs rpm -e --nodeps（不检查依赖，直接删除rpm包）

2、下载新的yum包

在以下下载地址为 一个个搜 ...........

http://rpm.pbone.net/

3、  下载地址都不能用了

[root@localhost ~]# wget http://mirrors.163.com/centos/7.1.1503/os/x86_64/Packages/yum-3.4.3-125.el7.centos.noarch.rpm

[root@localhost ~]# wget http://mirrors.163.com/centos/7.1.1503/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm

[root@localhost ~]# wget http://mirrors.163.com/centos/7.1.1503/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-29.el7.noarch.rpm

[root@localhost ~]# wget http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7

4、安装这些包

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

5、配置repo文件     配置阿里源  https://blog.csdn.net/CChenheng/article/details/79863888

[base]
name=CentOS-$7 - Base - aliyun.com
#mirrorlist=http://mirrorlist.centos.org/?release=$7&arch=$basearch&repo=os
baseurl=https://mirrors.aliyun.com/centos/7/os/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7

#released updates
[updates]
name=CentOS-$7 - Updates - aliyun.com
#mirrorlist=http://mirrorlist.centos.org/?release=$7&arch=$basearch&repo=updates
baseurl=https://mirrors.aliyun.com/centos/7/updates/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7

#additional packages that may be useful
[extras]
name=CentOS-$7 - Extras - aliyun.com
#mirrorlist=http://mirrorlist.centos.org/?release=$7&arch=$basearch&repo=extras
baseurl=https://mirrors.aliyun.com/centos/7/extras/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7

#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$7 - Plus - aliyun.com
baseurl=https://mirrors.aliyun.com/centos/7/centosplus/$basearch/
gpgcheck=1
enabled=0

gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7