yum命令安装软件时出现"Exiting on user cancel"错误的解决办法
解决办法：修改/usr/lib/python2.7/site-packages/urlgrabber/grabber.py文件，注释掉两行代码。如下：elif errcode in (42, 55, 56):# this is probably wrong but ultimately this is what happens
# we have a legit http code and a pycurl 'writer failed' code
# which almost always means something aborted it from outside
# since we cannot know what it is -I'm banking on it being
# a ctrl-c. XXXX - if there's a way of going back two raises to
# figure out what aborted the pycurl process FIXME
raise KeyboardInterrupt修改后：#elif errcode in (42, 55, 56):
# this is probably wrong but ultimately this is what happens
# we have a legit http code and a pycurl 'writer failed' code
# which almost always means something aborted it from outside
# since we cannot know what it is -I'm banking on it being
# a ctrl-c. XXXX - if there's a way of going back two raises to
# figure out what aborted the pycurl process FIXME
#raise KeyboardInterrupt
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