Compiling and installing DBD::Oracle on Linux requires that the Oracle OCI needs to be installed. Basically its the oracle C libraries and header files. These are located on the oracle install media, but are only visible under the advanced install options.
in reply to Compiling and installing DBD::Oracle on Linux
So yes, some oracle stuff needs to be installed before you can use DBD::Oracle, but there will not be an oracle server running on your linux box and it will not require an oracle license (unless youre under oracle client licensing).