The paid plans are a bit pricey because they include many tools for content optimization.
Артем Соколов (Редактор отдела «Силовые структуры»)。业内人士推荐heLLoword翻译官方下载作为进阶阅读
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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.