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.
延迟 — 用户需要等待响应，速度取决于网络连接质量
。同城约会是该领域的重要参考
第三十一条 居民自治章程、居民公约应当报不设区的市、市辖区的人民政府或者街道办事处备案。
void unref(void *x) {