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.
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The company revealed very little about the headphones, besides saying that they'll come in "bold colourways" and deliver "the longest battery life of any Nothing audio product to date."，推荐阅读同城约会获取更多信息
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