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ELK Stack is a full-featured data analytics platform, consists of three open-source tools Elasticsearch, Logstash, and Kibana. This stack helps you store and manage logs centrally and gives an ability to analyze them.
Ruby on Rails® simply known as Rails, is an open-source web application framework written in Ruby that helps you create highly powerful web sites and applications.
Puppet is an open-source configuration management tool that helps us to automate IT infrastructure, including provisioning, configuration management, patching of hundreds of client systems from the central location.
The Network Time Protocol (NTP) is a networking protocol for system clock synchronization with remote internet time servers or other sources such as GPS or radio clocks. Accurate timekeeping is crucial in servers for application to work correctly or troubleshooting issues with the help of logs time stamp.
VirtualBox is a free and open-source hypervisor software that allows you to create and run virtual machines of Linux, Windows, Solaris, BSD operating system. It can ben be installed on Linux, Windows, Solaris, OS X, and OpenSolaris.