How Do I Find the Library in Ubuntu?

For Ubuntu, you can either go to packages.ubuntu.com, search for your file, and see what version of the package is in your version of Ubuntu. Or from the command line, you can first search for the name of the associated package using dpkg -S /usr/lib/libnuma.

How do I see what libraries are installed on Linux?

The -v option will show the libraries version.

Where does Ubuntu Look for shared libraries?

Shared libraries are compiled code which is intended to be shared among several different programs. They are distributed as . so files in /usr/lib/. A library exports symbols which are the compiled versions of functions, classes and variables.