# Operations

Operate an existing installation using configuration checks, named refusals and recovery records.

Check the package and configuration separately from resource admission. Keep the named cause of a refusal and use recorded outcomes when deciding whether to retry.

[Configuration](/cambium/operations/configuration/)

The required operator values, private files and boot plan.
[Access and refusals](/cambium/operations/access-and-refusals/)

Distinguish sign-in, roster admission, field ownership and approval failures.
[Notifications](/cambium/operations/notifications/)

Follow the live wire and acknowledge deliberately.
[Backup and recovery](/cambium/operations/backup-and-recovery/)

The stopped-store backup contract and what a restore must preserve.