Linux   – An open-source operating system. Software on a computer that enables applications and the computer operator to access the devices on the computer to perform desired functions.
Hadoop – Free, Java-based programming framework that supports the processing of large/huge data sets in a distributed environment.
DevOps  – a culture, movement or practice that emphasizes the collaboration and communication of both software developers and other information-technology (IT) professionals while automating the process of software delivery and infrastructure changes.
WebLogic  – is a Java EE application server currently developed by Oracle Corporation.  Weblogic is a java application web server. You can do much more than server static files with weblogic application server.