/etc is also writable, but it’s managed a bit differently. OSTree uses a technique called “etc overlay” to handle modifications in /etc. When an update is applied, OSTree compares files in the new version with those in /etc and applies changes intelligently, preserving local modifications as much as possible.
2025年春节，一位北京朋友答应帮我们照看狗，算是把麻烦对付了过去；2026年，这位朋友因故无法再帮忙照看狗了，我们只好另外想辙。
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