1、报错信息如下：
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[root@sa ~]# yum install prce -y
There was a problem importing one of the Python modules required to run yum. The error leading to this problem was: libxml2.so.2: cannot open shared object file: No such file or directory
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:
2.6.6 (r266:84292, Oct 12 2012, 14:23:48) [GCC 4.4.6 20120305 (Red Hat 4.4.6-4)]If you cannot solve this problem yourself, please go to the yum faq at: http://yum.baseurl.org/wiki/Faq
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[root@sa yum.repos.d]# yum repolist
There was a problem importing one of the Python modules required to run yum. The error leading to this problem was: libxml2.so.2: cannot open shared object file: No such file or directory
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: 2.6.6 (r266:84292, Oct 12 2012, 14:23:48)
[GCC 4.4.6 20120305 (Red Hat 4.4.6-4)]If you cannot solve this problem yourself, please go to the yum faq at: http://yum.baseurl.org/wiki/Faq
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错误原因：错误信息描述为 yum 所依赖的python 不相符，请安装相对应的python即可
2、查看yum版本
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[root@develop local]# rpm -qa |grep yum
yum-3.2.8-9.el5.centos.1yum-metadata-parser-1.1.2-2.el5 |
3、查看python版本
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[root@develop local]# whereis python
python: /usr/bin/python2.4 /usr/bin/python /usr/lib/python2.4
/usr/local/bin/python2.6 /usr/local/bin/python2.6-config /usr/local/bin/python /usr/local/lib/python2.6 /usr/share/man/man1/python.1.gz
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果然装了两个版本python
4、执行python，查看到使用2.6.1的版本
[plain]view plaincopyprint?
[root@develop local]# python
Python 2.6.1 (r261:67515, Aug 7 2010, 11:36:17)
[GCC 4.1.2 20080704 (Red Hat 4.1.2-44)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>>
5、猜测yum调用了高版本的python。
6、解决方法：
查找yum和 yum-updatest文件,并编辑此py文件
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[root@develop local]# which yum
/usr/bin/yum [root@develop local]# vi /usr/bin/yum
[root@develop local]# vi /usr/bin/yum-updatest
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将
#!/usr/bin/python
改为:
#!/usr/bin/python2.4
然后保存OK.
如果不修改/usr/bin/yum ,则yum无法使用
如果不修改/usr/bin/yum-updatest 会出现如下错误
File "/usr/sbin/yum-updatesd", line 35, in
import dbus
ImportError: No module named dbus
当然，修改完后记着
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[root@localhost google_appengine]# /sbin/service yum-updatesd restart
Stopping yum-updatesd: [FAILED] Starting yum-updatesd: [ OK ] |
补充：yum基于python写的。