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Unit ACTIVE states

State | Description
--- | ---
`active` | Started, bound, plugged in, …, depending on the unit type.
`inactive` | Stopped, unbound, unplugged, …, depending on the unit type.
`failed` | Similar to `inactive`, but the unit failed in some way (process returned error code on exit, crashed, an operation timed out, or after too many restarts).
`activating` | Changing from `inactive` to `active`.
`deactivating` | Changing from `active` to `inactive`.
`maintenance` | Unit is `inactive` and a maintenance operation is in progress.
`reloading` | Unit is `active` and it is reloading its configuration.