[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fc70hmjndu3q6":3},{"type":4,"solution":5},"solution",{"slug":6,"platform":7,"title":8,"description":9,"risk":10,"categorySlug":11,"tags":12,"verifiedAt":22,"updatedAt":22,"categoryName":23,"command":24,"undoCommand":25,"directAnswer":26,"explanation":27,"warning":28,"seoTitle":29,"seoDescription":30,"requirements":31,"macosSupport":32,"sources":33,"related":46},"flush-dns-cache","macos","清除 Mac 的 DNS 缓存","网站解析到旧 IP 时，清空 macOS 的 DNS 缓存。","medium","network",[13,16,19],{"slug":14,"name":15},"dns","DNS",{"slug":17,"name":18},"diagnostics","诊断",{"slug":20,"name":21},"terminal","终端","2025-11-18T00:00:00.000Z","网络","sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder",null,"运行下面的命令，按提示输入管理员密码即可。DNS 缓存会立即清空，无需重启电脑。","macOS 会缓存 DNS 解析结果。当网站更换了服务器、而你的 Mac 仍记着旧 IP 时，刷新缓存可以强制重新解析。dscacheutil -flushcache 清空本地目录服务缓存，SIGHUP 信号让 mDNSResponder 守护进程丢弃 DNS 缓存。命令安全、瞬间完成。","需要 sudo 权限；清空缓存后，接下来几次网页访问可能略慢。","Mac 清除 DNS 缓存 — 终端命令","一条终端命令清除 macOS DNS 缓存，解决域名解析旧 IP 问题，附使用条件、风险说明和验证时间。","Administrator password (sudo)","macOS 10.11 El Capitan – 15 Sequoia",[34,40],{"url":35,"title":36,"publisher":37,"sourceType":38,"evidence":39,"retrievedAt":22},"https:\u002F\u002Fss64.com\u002Fmac\u002Fdscacheutil.html","dscacheutil — directory service cache utility","SS64","technical","dscacheutil -flushcache clears the directory service cache; mDNSResponder reload resets DNS caching.",{"url":41,"title":42,"publisher":43,"sourceType":44,"evidence":45,"retrievedAt":22},"https:\u002F\u002Fdeveloper.apple.com\u002Fforums\u002Fthread\u002F667913","mDNSResponder and DNS cache on modern macOS","Apple Developer Forums","apple-doc","SIGHUP to mDNSResponder flushes its DNS cache on current macOS releases.",[47,57,71],{"slug":48,"platform":7,"title":49,"description":50,"risk":51,"categorySlug":11,"tags":52,"verifiedAt":56,"updatedAt":56},"test-port-connectivity","测试 Mac 到主机的端口连通性","检测任意服务器的 TCP 端口是否可达，排查防火墙问题很实用。","low",[53,54,55],{"slug":17,"name":18},{"slug":14,"name":15},{"slug":20,"name":21},"2025-11-13T00:00:00.000Z",{"slug":58,"platform":7,"title":59,"description":60,"risk":51,"categorySlug":61,"tags":62,"verifiedAt":70,"updatedAt":70},"find-process-using-port","查看 Mac 上哪个进程占用了端口","找出占用 8080（或任意端口）的应用。","developer",[63,66,69],{"slug":64,"name":65},"lsof","lsof 文件占用",{"slug":67,"name":68},"processes","进程",{"slug":17,"name":18},"2025-11-16T00:00:00.000Z",{"slug":72,"platform":7,"title":73,"description":74,"risk":10,"categorySlug":75,"tags":76,"verifiedAt":84,"updatedAt":84},"show-wifi-password","查看 Mac 保存的 Wi-Fi 密码","查看你的 Mac 连接过的无线网络密码。","security",[77,80,83],{"slug":78,"name":79},"keychain","钥匙串",{"slug":81,"name":82},"wifi","Wi-Fi",{"slug":17,"name":18},"2025-11-17T00:00:00.000Z"]