This article provides a step-by-step guide to setting up and monitoring a multi-node Apache Cassandra cluster on Linux using Ubuntu 11.04 machines. The process involves confirming prerequisites, downloading the DataStax Community Edition bundle, generating tokens for each machine in the cluster, configuring startup parameters, starting nodes, installing DataStax OpsCenter, and monitoring the cluster. The guide also mentions that the same process can be applied to other Linux platforms such as Red Hat, CentOS, and Debian.