There was a problem importing one of the Python modulesrequired to run yum. The error leading to this problem was:
/usr/lib64/python2.6/site-packages/pycurl.so: undefined symbol: CRYPTO_set_locking_callback
Please install a package which provides this module, orverify that the module is installed correctly.
It's possible that the above module doesn't match thecurrent version of Python, which is:2.6.6 (r266:84292, Aug 18 2016, 15:13:37)[GCC 4.4.7 20120313 (Red Hat 4.4.7-17)]
If you cannot solve this problem yourself, please go tothe yum faq at:http://yum.baseurl.org/wiki/Faq
解决办法共三步：
rm -rf /usr/local/lib/libcurl* rm -rf /usr/local/lib/libcurl.so.4 ln -s /usr/lib64/libcurl.so.4.1.1 /usr/local/lib/libcurl.so.4