Could you list the systems used for configuration management of software products?

Configuration Management Systems help automate the deployment, configuration, and maintenance of software products. Popular tools:

• Ansible — agentless, uses SSH for server management.
• Puppet — uses a declarative language to describe configurations.
• Chef — based on Ruby, uses recipes for configurations.
• SaltStack — fast and scalable, supports both push and pull models.
• Terraform — more for infrastructure as code, but often used together with CM.

These tools help maintain environment consistency, automate updates, and simplify scaling.