yum安装报错“No module named yum”
Tags： LinuxNo module named yumPython升级yumyum安装故障处理重新安装yum
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现象
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 | [root@XT-Server80 yum.repos.d]# yum install -y wget There was a problem importing one of the Python modules required to run yum. The error leading to this problem was: No module named yum 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: 2.7.12 (default, May 15 2020, 01:24:42) [GCC 4.8.5 20150623 (Red Hat 4.8.5-39)] If you cannot solve this problem yourself, please go to the yum faq at: http://yum.baseurl.org/wiki/Faq [root@XT-Server80 yum.repos.d]# cat /etc/redhat-release CentOS Linux release 7.6.1810 (Core) [root@XT-Server80 yum.repos.d]# python -V Python 2.7.12 [root@XT-Server80 Python-2.7.5]# python Python 2.7.12 (default, May 15 2020, 01:24:42) [GCC 4.8.5 20150623 (Red Hat 4.8.5-39)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import yum Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: No module named yum >>> import sys >>> import yum Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: No module named yum >>> |
故障分析
在CentOS 7上，yum依赖的Python版本为 2.7.5版本。在CentOS 6上，yum依赖的Python版本为 2.6.6版本。
原理：yum依赖于python，运行yum指令实际上是在python环境调用yum库运行后续指令；
报错原因：通常是安装了高版本的python替换了系统内置的，由于版本高，库没有，导致没法使用。
解决办法
1、若原来的Python版本还在，那么需要修改2个文件：vim /usr/bin/yum 和 vi /usr/libexec/urlgrabber-ext-down
将第一行代码#!/usr/bin/python改成python原来的版本： #!/usr/bin/pythonXXX
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