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/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.。关于这个话题，im钱包官方下载提供了深入分析
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（三）其他扰乱网络线路、电话线路实名制管理的行为。
│ └─────┬─────┘，更多细节参见safew官方版本下载