Thus, there’s the /usr/etc folder containing the immutable version of configuration files, and /etc which is the mutable directory. If I modify a file in /etc and ask OSTree to compare with the new version, it will show me the differences and preserve my local modifications.
// 核心过滤：弹出栈中「≤当前元素」的数（易错点2：必须是≤，不是<）
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It was dramatically extended after the spacecraft Butch and Suni had used to travel to the International Space Station suffered technical problems.
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Author(s): Quentin Bizot, Ryo Tamura, Guillaume Deffrennes
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