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.
Photograph: Simon Hill
。业内人士推荐旺商聊官方下载作为进阶阅读
那麼，在這麼多選擇中，究竟哪種才是最有效、具有科學根據的語言學習方式呢？
务实功，摸实情，求实效，第一步走得实，才能步步走得稳。正因如此，之江大地才有“一张蓝图绘到底”的韧劲，一任接着一任干。