# References

> Detailed reference information and lists, supported Linux distros, available modules, metrics, extensions, and more.

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LLMS index: [llms.txt](/llms.txt)

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Section pages:

- [Supported Linux](/docs/ref/linux/): Pigsty compatible Linux OS distribution major versions and CPU architectures
- [Modules](/docs/ref/module/): This article lists available Pigsty modules and the current module planning.
- [File Hierarchy](/docs/ref/fhs/): How Pigsty's file system structure is designed and organized, and directory structures used by each module.
- [Parameters](/docs/ref/param/): Pigsty v4.x configuration overview and module parameter navigation
- [Playbooks](/docs/ref/playbook/): Pigsty v4.x preset Ansible playbook navigation and execution notes
- [Port List](/docs/ref/port/): Default ports used by Pigsty components, with related parameters and status.