Error: /usr/lib64/python2.6/site-packages/pycurl.so: undefined symbol: CRYPTO_set_locking_callback

This error messages gets thrown when I run ANY yum command.  After lots of googling and finding nothing I stumbled upon part of the solution (First Link Below).

The page pointed out a system variable "LD_LIBRARY_PATH".  This variable was not set on working machines but it WAS set on machines that had Matlab installed.

I believe matlab must set this for root account which breaks yum.  Here is how I fixed it.  There was a user named matlab_user already created so I just moved the value to the user's bash profile.

This is for the root account

echo "export LD_LIBRARY_PATH=" >> /root/.bashrc
cat /root/.bashrc

This is for the matlab_user

echo "export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/opt/MATLAB/MATLAB_Runtime/v81/runtime/glnxa64:/opt/MATLAB/MATLAB_Runtime/v81/bin/glnxa64:/opt/MATLAB/MATLAB_Runtime/v81/sys/os/glnxa64:/opt/MATLAB/MATLAB_Runtime/v81/sys/java/jre/glnxa64/jre/lib/amd64/native_threads:/opt/MATLAB/MATLAB_Runtime/v81/sys/java/jre/glnxa64/jre/lib/amd64/server:/opt/MATLAB/MATLAB_Runtime/v81/sys/java/jre/glnxa64/jre/lib/amd64:/opt/MATLAB/MATLAB_Runtime/v84/runtime/glnxa64:/opt/MATLAB/MATLAB_Runtime/v84/bin/glnxa64:/opt/MATLAB/MATLAB_Runtime/v84/sys/os/glnxa64:/opt/MATLAB/MATLAB_Runtime/v85/runtime/glnxa64:/opt/MATLAB/MATLAB_Runtime/v85/bin/glnxa64:/opt/MATLAB/MATLAB_Runtime/v85/sys/os/glnxa64" >> /home/matlab_user/.bashrc

cat /home/matlab_user/.bashrc

Source:  Link