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 Open Source Endowment is so obvious in hindsight, it's high time we brought。服务器推荐对此有专业解读
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在这个承前启后的节点，每一次更迭，是个体转场跃迁的落款，亦是企业演进变迁的注脚。