Shared Libraries

It's important for each node to know where shared libraries exist.  /lib and /usr/lib are trusted lib directories, but anything else needs to be manually added.  One 'safe' approach is to add a file whatever.conf to /etc/ld.so.conf.d/ -- whatever.conf would contain the directory of additional shared libraries.

You can also use something lide LD_LIBRARY_PATH or something like that, but I've heard it's insecure (for whatever reason)