Top 15 DevOps tools that are mandatory to learn

There are a large number of DevOps tools available in the market today, and the following is a non-exhaustive list of some of the most popular ones:

1. Ansible: A configuration management tool for automating server provisioning and deployment.
2. Jenkins: An open-source automation server that helps with continuous integration and continuous delivery (CI/CD).
3. Git: A version control system for tracking changes in source code.
4. Docker: A containerization platform for packaging and deploying applications.
5. Kubernetes: An open-source container orchestration platform for automating deployment, scaling, and management of containerized applications.
6. Puppet: A configuration management tool that helps with automating software deployment and infrastructure management.
7. Chef: A configuration management tool for automating server provisioning and deployment.
8. Terraform: A tool for managing infrastructure as code.
9. Nagios: A system and network monitoring tool for identifying and resolving IT infrastructure issues.
10. Splunk: A log management and analysis tool for gathering, analyzing, and visualizing data from various sources.
11. New Relic: A monitoring tool that helps with application performance management (APM).
12. ELK Stack (Elasticsearch, Logstash, Kibana): A combination of open-source tools for log management and analysis.
13. Grafana: A visualization and analytics platform for monitoring and analyzing metrics from various sources.
14. AWS CloudFormation: A tool for deploying and managing AWS infrastructure using templates.
15. Azure DevOps: A suite of tools for managing the entire software development life cycle, including source control, continuous integration and deployment, and project management.

This is just a small selection of the many DevOps tools available. The specific tools that are best for a given organization will depend on its specific needs and goals.