correct sudo command
This way it works and users can just copy paste and run it
@@ -138,5 +138,5 @@ located in ``/usr/local/lib``. In some Linux flavors the loader doesn't look for
libraries in this path by default, we must instruct it to do so by adding
``/usr/local/lib`` to the loader configuration file ``/etc/ld.so.conf``::
- sudo echo "/usr/local/lib" >> /etc/ld.so.conf
+ sudo sh -c 'echo "/usr/local/lib" >> /etc/ld.so.conf'
sudo ldconfig
