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DevOps
Infrastructure as code and server management.
Ansible
The go-to for configuration management and scripted server setup when you're not fully containerized. Still widely used for VPS provisioning.
Docker
Still how you package and run anything consistently across machines. Not going anywhere.
OpenTofu
The open-source, Linux Foundation-governed fork of Terraform for anyone who wants the same workflow without the IBM/HashiCorp license concerns. Mostly drop-in compatible.
Pulumi
Infrastructure as code in a real language (TypeScript, Python, Go) instead of HCL, which makes testing and code review feel normal if you're already a software engineer.
Terraform
The standard for infrastructure as code, now under IBM after the HashiCorp acquisition. Still the most widely documented option even with the licensing baggage.