python2.6升级2.7导致yum无法使用 No module named yum

这里有解决方法：https://teddysun.com/473.html

记住旧版本 Python 2.6.6 的重要路径如下所示，在运行 yum 命令的时候，会提示你哪个 module 不存在，不存在的我们就去旧版本的路径下找，一定能找到的。找到后，复制到新版本 Python 的路径 /usr/local/lib/python2.7/site-packages/ 下即可。

/usr/lib/python2./site-packages/
/usr/lib64/python2./site-packages/

cp -r /usr/lib/python2./site-packages/yum /usr/local/lib/python2./site-packages/
cp -r /usr/lib/python2./site-packages/rpmUtils /usr/local/lib/python2./site-packages/
cp -r /usr/lib/python2./site-packages/iniparse /usr/local/lib/python2./site-packages/
cp -r /usr/lib/python2./site-packages/urlgrabber /usr/local/lib/python2./site-packages/
cp -r /usr/lib64/python2./site-packages/rpm /usr/local/lib/python2./site-packages/
cp -r /usr/lib64/python2./site-packages/curl /usr/local/lib/python2./site-packages/
cp -p /usr/lib64/python2./site-packages/pycurl.so /usr/local/lib/python2./site-packages/
cp -p /usr/lib64/python2./site-packages/_sqlitecache.so /usr/local/lib/python2./site-packages/
cp -p /usr/lib64/python2./site-packages/sqlitecachec.py /usr/local/lib/python2./site-packages/
cp -p /usr/lib64/python2./site-packages/sqlitecachec.pyc /usr/local/lib/python2./site-packages/
cp -p /usr/lib64/python2./site-packages/sqlitecachec.pyo /usr/local/lib/python2./site-packages/

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原来是：

#!/usr/bin/python

改为下图：

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今天用yum安装软件的时候出现如下错误:

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:
 If you cannot solve this problem yourself, please go to the yum faq at:

http://wiki.linux.duke.edu/YumFaq

yum 错误，搜索一番后知道是yum和Python是依赖关系，yum是python的模块，所以采用以下解决方案：

系统python的当前版本  Python 2.7

 肯定是yum的版本与当前python的版本不一致造成的

所以修改yum的配置，修改文件： vim /usr/bin/yum

修改头#!/usr/bin/python  => #!/usr/bin/python2.6

dd