Install Oracle 11gR2 driver for Node.js 0.10.20
This means that you have to include Oracle instant client libraries into the database used by Linux dynamic linker when it has to resolve run time bindings.

Instructions tells you to create new .conf file in /etc/ld.so.conf.d/ directory with the Oracle instant client libraries directory. And then you have to run ldconfig with root permissions so that it will create new database with the Oracle instant client libraries included.

Example from one of our servers:

# cat /etc/ld.so.conf.d/oracle.conf
/usr/lib/oracle/11.2/client64/lib/


.conf file name does not matter.