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.
Александра Синицына (Ночной линейный редактор)
，这一点在快连下载安装中也有详细论述
NYT Connections hints today: Clues, answers for February 28, 2026
The false positives at the bottom