# How to Install MongoDB on Linux
http://www.thegeekstuff.com/2013/01/install-mongodb/
# How to Install Apache CouchDB on CentOS 6
http://www.thegeekstuff.com/2012/06/install-couch-db/
# How To Install Apache Hadoop Pseudo Distributed Mode on a Single Node
http://www.thegeekstuff.com/2012/02/hadoop-pseudo-distributed-installation/
# Apache Hadoop Single Node Standalone Installation Tutorial
http://www.thegeekstuff.com/2012/02/hadoop-standalone-installation/