yum 出现错误：
root@iZ23t4pnz63Z ~]# yum update
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.aliyuncs.com
* epel: mirrors.aliyuncs.com
* extras: mirrors.aliyuncs.com
* updates: mirrors.aliyuncs.com
Traceback (most recent call last):
File "/usr/libexec/urlgrabber-ext-down", line 22, in <module>
from urlgrabber.grabber import ImportError: No module named urlgrabber.grabber
Traceback (most recent call last):
File "/usr/libexec/urlgrabber-ext-down", line 22, in <module>
from urlgrabber.grabber import ImportError: No module named urlgrabber.grabber
vi /usr/libexec/urlgrabber-ext-down
把头部的python改成和/usr/bin/yum中一样的
yum 出现错误ImportError: No module named urlgrabber.grabber
原文：http://www.cnblogs.com/zhouxinfei/p/7895532.html