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问题已解决，DNS解析顺序的问题，优先读了/etc/resolv.conf（软链接），注释或者删掉/tmp/resolv.conf的配置，系统就能自动读到/etc/hosts里的配置了
请问DNS怎么刷新呢？这边更改了/etc/hosts文件，使用systemctl、systemd、service命令都不支持，尝试过重启系统DNS还是没法刷新