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.
代码里最“不明觉厉”的部分来了：。关于这个话题，WPS下载最新地址提供了深入分析
，详情可参考safew官方下载
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Updates with Bootc and OSTree。业内人士推荐搜狗输入法2026作为进阶阅读
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