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## 编辑网络配置文件
Docker 1.2.0 开始支持在运行中的容器里编辑 `/etc/hosts`, `/etc/hostname` 和 `/etc/resolv.conf` 文件。
但是这些修改是临时的，只在运行的容器中保留，容器终止或重启后并不会被保存下来，也不会被 `docker commit` 提交。