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.
For this story, WIRED reviewed dozens of NASA documents, including backup plans and contingencies for emergencies, and spoke to more than a dozen people, including three astronauts who’ve visited the ISS, and no one seemed that freaked out. One astronaut said the most worrisome scenario that actively crossed his mind in orbit was getting a toothache. The ISS has had some emergencies, including a first-ever medical evacuation in January, but generally things have been remarkably stable. In fact, one of the most impressive things about the ISS is that nothing very dramatic has ever happened to it. No experiment has gone too haywire. It hasn’t been hit by an asteroid.
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居住在上海的德商麥永剛（Juergen Meyer），2013年以德國財務與風險管理經理的身份來到中國，之後長居上海，在金融及IT領域工作，專注於企業整體獲利與風險管理。最近他與上海夥伴合著《與中國做生意的企業風險管理》一書，詳細剖析在中國經商的逾50種風險。。关于这个话题，服务器推荐提供了深入分析
一位广西壮族自治区某县城的车友发帖直言，“以前回村过年是闯关，现在是开挂。第一次跑900公里，充电方便无焦虑，智能驾驶即便是村子里窄道后视镜都快蹭到墙的窄路也不再是‘噩梦’。”