在机器中分别装了2个比系统默认版本高的python后，再次使用yum的时候发现报错了，如下：
[root@localhost ~]# yumThere 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: 2.6.8 (unknown, Jun 18 2015, 16:07:56) [GCC 4.4.7 20120313 (Red Hat 4.4.7-4)]If you cannot solve this problem yourself, please go to the yum faq at: http://yum.baseurl.org/wiki/Faq
yum是用python实现的，应该是默认执行时用了不匹配的版本，将yum中的python版本改到能import yum模块的即可。
- 查看系统中有哪些python
[root@localhost ~]# whereis pythonpython: /usr/bin/python2.6-config /usr/bin/python /usr/bin/python2.6 /usr/lib/python2.6 /usr/lib64/python2.6 /usr/local/bin/python2.6-config /usr/local/bin/python /usr/local/bin/python2.7-config /usr/local/bin/python2.7 /usr/local/bin/python2.6 /usr/local/lib/python2.7 /usr/local/lib/python2.6 /usr/include/python2.6 /usr/share/man/man1/python.1.gz
- 先测试2.6的
[root@localhost ~]# /usr/bin/python2.6Python 2.6.6 (r266:84292, Nov 22 2013, 12:16:22) [GCC 4.4.7 20120313 (Red Hat 4.4.7-4)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import yum >>> exit()
再测试默认2.7.10的[root@localhost ~]# pythonPython 2.7.10 (default, Jun 18 2015, 15:51:08) [GCC 4.4.7 20120313 (Red Hat 4.4.7-4)] 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 >>> exit()
- 修改yum的默认python版本
[root@localhost ~]# vim /usr/bin/yum#!/usr/bin/python2.6
