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.
為何美國以色列此刻出手？伊朗進入「生存模式」，結局仍充滿變數，详情可参考新收录的资料
Москвичам пообещали тепло17:31，这一点在新收录的资料中也有详细论述
這句話的意思是清楚的：北京歡迎歐洲靠近，但拒絕歐洲以「去風險」或產業保護為由築牆。，推荐阅读新收录的资料获取更多信息
这就触及了伊斯兰教最根本的大分裂 (The Sunni-Shia Schism)。(AP World History Unit 1: Dar al-Islam / The Global Tapestry)