A recoverable Linux home server backup includes irreplaceable data, service configuration, databases, persistent container data, secrets and recovery documentation, then proves the plan with a restore into a clean environment.
Recovering a failed Linux server is easiest when dependencies are restored in layers: healthy hardware, base OS, networking, service definitions, persistent data, then application-by-application verification.
Recovering an automated home means restoring more than a server backup: the plan must account for the LAN, controller, radios, device integrations, storage, credentials, automations and manual fallbacks in a deliberate recovery order.
A recoverable website backup includes the database or content store, uploads, code, configuration, DNS details and critical external dependencies, with another copy outside the production account and regular restore testing.