How To Install Graylog 1.x on CentOS 7
In this tutorial, we will cover how to install Graylog v1.3.x (sometimes referred to as Graylog2) on CentOS 7, and configure it to gather the syslogs of your systems in a centralized location. Graylog is a powerful log management and analysis tool that has many use cases, from monitoring SSH logins and unusual activity to debugging applications. It is based on Elasticsearch, Java, and MongoDB.