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But of course, like any immutable system, there are mutable parts (otherwise, we couldn’t create any configuration files). OSTree handles this with “overlays” (actually, we use OverlayFS) that allow a read-write filesystem to be layered on top of the immutable system. For example, the /etc and /var directories are writable, while the rest of the system is read-only.
The Labour MP said it was "critical that we really consider what the impacts of data centres will be before we charge into approving them en masse".，这一点在夫子中也有详细论述