我的CSDN博客：https://blog.csdn.net/qq_36731677/article/details/83552436
问题描述
今天接手了一个被搞乱的服务器，在安装数据库的时候出现了大量的yum错误（如下列内容所示）。所以就在瞎折腾，我仅把我解决的过程作结一下供大家参考。
错误一
Not removing XXX because it is required XXX
--------------------------------------------------------------------------------------
There are unfinished transactions remaining. You might consider running yum-complete-transaction first to finish them.
The program yum-complete-transaction is found in the yum-utils package. 错误二
There was a problem importing one of the Python modules
required to run yum. The error leading to this problem was:
/usr/lib64/python2.7/site-packages/rpm/_rpm.so: undefined symbol: rpmpkgVerifySi
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, Apr 11 2018, 07:36:10)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-28)]
If you cannot solve this problem yourself, please go to
the yum faq at:
http://yum.baseurl.org/wiki/Faq对于依赖冲突问题的解决方式
- 使用一个小工具yum-complete-transaction
yum install yum-utils - 清理未完成的yum事务
yum-complete-transaction –cleanup-only - 列出有问题的软件包
package-cleanup –problems - 列出重复安装的软件包
package-cleanup –dupes - 清除重复的已安装的包
package-cleanup –cleandupes
如果是问题是缺少依赖，你可能需要手动安装这些依赖，我暂时没找到自动补全依赖的命令。
但是，这个流程只能解决一部分问题，就算删了旧内核也没有用，所以我在下面采用了删除python和yum重装的策略来解决。
重装python和yum
- 卸载现有的python
强制删除已安装程序及其关联
rpm -qa|grep python|xargs rpm -ev --allmatches --nodeps
强制删除所有残余文件
whereis python |xargs rm -frv - 卸载现有的yum
rpm -qa|grep yum|xarg 强制删除已安装程序及其关联s rpm -ev --allmatches --nodeps
强制删除所有残余文件
whereis yum |xargs rm -frv - 下载与自己版本对应的rpm包
查看自己系统版本的命令：cat /etc/redhat-release
下载地址链接：http://mirrors.ustc.edu.cn/centos/
CentOS7.5的rpm包：http://mirrors.ustc.edu.cn/centos/7.5.1804/os/x86_64/Packages/
我下载的rpm包，如果在安装过程中提醒你有被依赖的，你可以在库中下载同名的rpm包。
libxml2-python-2.9.1-6.el7_2.3.x86_64.rpm
python-2.7.5-68.el7.x86_64.rpm
python-backports-1.0-8.el7.x86_64.rpm
python-backports-ssl_match_hostname-3.5.0.1-1.el7.noarch.rpm
python-chardet-2.2.1-1.el7_1.noarch.rpm
python-devel-2.7.5-68.el7.x86_64.rpm
python-iniparse-0.4-9.el7.noarch.rpm
python-ipaddress-1.0.16-2.el7.noarch.rpm
python-kitchen-1.1.1-5.el7.noarch.rpm
python-libs-2.7.5-68.el7.x86_64.rpm
python-pycurl-7.19.0-19.el7.x86_64.rpm
python-setuptools-0.9.8-7.el7.noarch.rpm
python-urlgrabber-3.10-8.el7.noarch.rpm
python-virtualenv-15.1.0-2.el7.noarch.rpm
rpm-4.11.3-32.el7.x86_64.rpm
rpm-build-4.11.3-32.el7.x86_64.rpm
rpm-build-libs-4.11.3-32.el7.x86_64.rpm
rpm-libs-4.11.3-32.el7.x86_64.rpm
rpm-python-4.11.3-32.el7.x86_64.rpm
rpm-sign-4.11.3-32.el7.x86_64.rpm
yum-3.4.3-158.el7.centos.noarch.rpm
yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
yum-plugin-aliases-1.1.31-45.el7.noarch.rpm
yum-plugin-fastestmirror-1.1.31-45.el7.noarch.rpm
yum-plugin-protectbase-1.1.31-45.el7.noarch.rpm
yum-utils-1.1.31-45.el7.noarch.rpm下载完成后安装这些包，有些依赖你可能要自己解决
rpm -Uvh --replacepkgs *.rpm
如果安装完成后键入yum能有正常显示，就说明安装成功了。如果出现了文章开头的错误二，那可能代表着你的rpm包没安装全。
在yum安装成功后，可将源文件清空并下载新的源
可参考：https://blog.csdn.net/qq_36731677/article/details/58288979
之后逐步更新源数据
yum clean all
yum makecache
yum --skip-broken update参考链接
https://superuser.com/questions/1302240/usr-lib64-python2-7-site-packages-rpm-rpm-so-undefined-symbol-rpmpkgverifysi
