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Important Routing Notes，详情可参考服务器推荐
“一切贪图安逸、不愿继续艰苦奋斗的想法都是要不得的，一切骄傲自满、不愿继续开拓前进的想法都是要不得的。”，这一点在WPS下载最新地址中也有详细论述
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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.