升级python版本号后，执行yum # yum -y install openssl 提演示样例如以下: 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: 2.7.3 (default, Jul 15 2014, 16:52:36) [GCC 4.1.2 20080704 (Red Hat 4.1.2-48)]
If you cannot solve this problem yourself, please go to the yum faq at: http://wiki.linux.duke.edu/YumFaq
分析应该是yum和Python是依赖关系，yum是python的模块，所以须要改动yum来解决: 1. 查看python的安装路径 # python Python 2.7.3 (default, Jul 15 2014, 16:52:36) [GCC 4.1.2 20080704 (Red Hat 4.1.2-48)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> # whereis python python: /usr/bin/python2.4 /usr/bin/python /usr/bin/python2.6 /usr/lib/python2.4 /usr/local/bin/python /usr/local/bin/python2.6-config /usr/local/bin/python3.3-config /usr/local/bin/python3.3 /usr/local/bin/python3.3m /usr/local/bin/python3.3m-config /usr/local/bin/python2.6 /usr/local/lib/python2.4 /usr/local/lib/python3.3 /usr/local/lib/python2.6 /usr/include/python2.4 /usr/share/man/man1/python.1.gz
2. 改动yum # vim /usr/bin/yum 将 #!/usr/bin/python 改成 #!/usr/bin/python2.4 【保存并退出】
