问题描述
[root@cs7 ~]# yum install 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:
2.6.9 (unknown, Dec 23 2016, 04:32:34)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-4)]
If you cannot solve this problem yourself, please Go to
the yum faq at:
http://yum.baseurl.org/wiki/Faq
分析与解决
yum是基于python编写的
1.查看yum版本
[root@cs7 ~]# rpm -qa |grep yum
yum-plugin-fastestmirror-1.1.31-34.el7.noarch
yum-metadata-parser-1.1.4-10.el7.x86_64
yum-3.4.3-132.el7.centos.0.1.noarch
2.查看python
[root@cs7 ~]# whereis python
python: /usr/bin/python2.7 /usr/bin/python /usr/bin/python2.7-config /usr/bin/python2.6 /usr/bin/python2.6-config /usr/bin/python2.bak /usr/lib/python2.7 /usr/lib/python2.6 /usr/lib64/python2.7 /etc/python /usr/local/bin/python2.6 /usr/local/bin/python2.6-config /usr/local/lib/python2.6 /usr/include/python2.7 /usr/share/man/man1/python.1.gz
果真存在两个python: /usr/bin/python2.7和/usr/lib/python2.6
3.查找编辑yum文件
[root@cs7 ~]# which yum
/usr/bin/yum
[root@cs7 ~]# vi /usr/bin/yum
#!/usr/bin/python
修改为：
#!/usr/bin/python2.7
[root@cs7 ~]#
4.补充
CentOS 6只要修改/usr/bin/yum
CentOS 7需要同时修改/usr/bin/yum以及/usr/libexec/urlgrabber-ext-down同样的Python版本
#!/usr/bin/python
修改为：
#!/usr/bin/python2.7
问题即可解决！