CentOS-Linux-release-7.4.1708-(Core)-的yum重装
作者：廖剑曦 时间：2017年11月17日 妖怪未成精，只怪太年轻。我是一个新手，把yum给删了 解决方法分为三部曲
第一部（缺啥补啥，缺yumx下yum）
下载yum源码包并安装
step1：wget http://yum.baseurl.org/download/3.4/yum-3.4.3.tar.gz#获取yum安装包
step2 tar zxvf yum-3.4.3.tar.gz
step3 cd yum-3.4.3
然后运行./yummain.py install yum出现如下报错
问题###./yummain.py Traceback (most recent call last): File “./yummain.py”, line 28, in <module> from yum import Errors File “/root/nagios/yum-3.4.3/yum/init.py”, line 52, in <module> import config File “/root/nagios/yum-3.4.3/yum/config.py”, line 30, in <module> from parser import ConfigPreProcessor, varReplace File “/root/nagios/yum-3.4.3/yum/parser.py”, line 4, in <module> import urlgrabber ImportError: No module named urlgrabber
问题###./yummain.py Traceback (most recent call last): File “./yummain.py”, line 28, in <module> from yum import Errors File “/root/nagios/yum-3.4.3/yum/init.py”, line 55, in <module> import rpmsack File “/root/nagios/yum-3.4.3 /yum/rpmsack.py”, line 38, in <module> import yum.depsolve File “/root/nagios/yum-3.4.3/yum/depsolve.py”, line 30, in <module> from transactioninfo import TransactionMember File “/root/nagios/yum-3.4.3 /yum/transactioninfo.py”, line 32, in <module> from sqlitesack import YumAvailablePackageSqlite File “/root/nagios/yum-3.4.3/yum/sqlitesack.py”, line 26, in <module> import yumRepo File “/root/nagios/yum-3.4.3/yum/yumRepo .py”, line 33, in <module> import sqlitecachec ImportError: No module named sqlitecachec
第二部（毛主席说过：“没有条件，创造条件”）
首先安装python-urlgrabber，python-pycurl，yum-metadata-parser
以下是我找到的rpm安装包连接；
http://mirrors.163.com/centos/7/os/x86_64/Packages/python-urlgrabber-3.10-8.el7.noarch.rpm
http://mirrors.163.com/centos/7/os/x86_64/Packages/python-pycurl-7.19.0-19.el7.x86_64.rpm
http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
新建一个文件夹，获取三个安装包 rmp -ivh * #进行安装
如果连接失效推荐到： http://tel.mirrors.163.com/ 里面去找
安装成功后 再进入yum-3.4.3·文件夹中 运行./yummain.py install yum
如果出现以下报错 ./yummain.py CRITICAL:yum.cli:Config Error: Error accessing file for config file:///etc/yum.conf
解决方法：创建yum.conf touch /etc/yum.conf 接着再运行./yummain.py install yum
