{"id":30695,"date":"2026-05-08T10:00:00","date_gmt":"2026-05-08T02:00:00","guid":{"rendered":"https:\/\/cn.hostease.com\/blog\/?p=30695"},"modified":"2026-05-16T22:44:04","modified_gmt":"2026-05-16T14:44:04","slug":"linux-sysctl-practical","status":"publish","type":"post","link":"https:\/\/cn.hostease.com\/blog\/linux\/linux-sysctl-practical\/","title":{"rendered":"Linux sysctl \u5185\u6838\u53c2\u6570\u8c03\u4f18\u5b9e\u6218"},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Linux sysctl \u5185\u6838\u53c2\u6570\u8c03\u4f18\u5b9e\u6218\u793a\u610f\" src=\"https:\/\/cn.hostease.com\/blog\/wp-content\/uploads\/2026\/05\/linux-sysctl-practical-cover.webp\" \/><\/p>\n<p>\u672c\u6587\u6559\u4f60\u5982\u4f55\u5728\u751f\u4ea7\u73af\u5883\u7528 sysctl \u8c03\u4f18 Linux \u5185\u6838\u7f51\u7edc\u6808\u4e0e\u8fde\u63a5\u5904\u7406\u53c2\u6570\uff0c\u8986\u76d6 TCP\uff08Transmission Control Protocol\uff0c\u4f20\u8f93\u63a7\u5236\u534f\u8bae\uff09\u961f\u5217\u3001TIME_WAIT \u56de\u6536\u3001\u62e5\u585e\u63a7\u5236\u4e0e conntrack \u8868\u56db\u7c7b\u9ad8\u9891\u573a\u666f\u3002\u8bfb\u5b8c\u4f60\u4f1a\u5f97\u5230\u4e09\u4ef6\u4ea7\u51fa\uff1a\u4e00\u4efd\u6309\u7528\u9014\u5206\u7ec4\u7684 sysctl.d \u6a21\u677f\uff1b\u8c03\u4f18\u524d\u540e\u7684 ss \u4e0e netstat \u9a8c\u8bc1\u6b65\u9aa4\uff1b\u9488\u5bf9\u751f\u6548\u5931\u8d25\u3001\u53c2\u6570\u88ab\u8986\u76d6\u3001\u5bb9\u5668\u547d\u540d\u7a7a\u95f4\u9694\u79bb\u7684\u8e29\u5751\u6e05\u5355\u3002<\/p>\n<h2>\u4e00\u3001sysctl \u7684\u5de5\u4f5c\u673a\u5236\u4e0e\u751f\u6548\u8def\u5f84<\/h2>\n<p>sysctl \u662f Linux \u66b4\u9732 <code>\/proc\/sys<\/code> \u76ee\u5f55\u4e0b\u5185\u6838\u53c2\u6570\u7684\u7edf\u4e00\u63a5\u53e3\uff0c\u6240\u6709\u53ef\u8c03\u9879\u6700\u7ec8\u90fd\u843d\u5728\u865a\u62df\u6587\u4ef6\u7cfb\u7edf\u91cc\u3002\u4e34\u65f6\u6539\u52a8\u7528 <code>sysctl -w net.core.somaxconn=65535<\/code>\uff0c\u6301\u4e45\u5316\u5fc5\u987b\u5199\u8fdb <code>\/etc\/sysctl.conf<\/code> \u6216 <code>\/etc\/sysctl.d\/*.conf<\/code>\uff0c\u7136\u540e\u7528 <code>sysctl --system<\/code> \u91cd\u65b0\u52a0\u8f7d\u3002\u4e3a\u4ec0\u4e48\u5f88\u591a\u4eba\u6539\u5b8c\u4e0d\u751f\u6548\uff1f\u5e38\u89c1\u539f\u56e0\u662f\u540c\u540d\u53c2\u6570\u5728\u4e0d\u540c\u6587\u4ef6\u91cc\u88ab\u540e\u52a0\u8f7d\u7684\u6587\u4ef6\u8986\u76d6\uff0csysctl.d \u76ee\u5f55\u6309\u5b57\u5178\u5e8f\u52a0\u8f7d\uff0c\u5efa\u8bae\u628a\u751f\u4ea7\u7528\u7684\u6587\u4ef6\u547d\u540d\u4e3a <code>99-tuning.conf<\/code> \u8ba9\u5b83\u6700\u540e\u751f\u6548\u3002<\/p>\n<p>\u5982\u4f55\u786e\u8ba4\u53c2\u6570\u771f\u6b63\u843d\u5730\uff1f\u4e24\u6b65\uff1a\u5148 <code>sysctl net.core.somaxconn<\/code> \u8bfb\u5f53\u524d\u503c\uff0c\u518d <code>cat \/proc\/sys\/net\/core\/somaxconn<\/code> \u76f4\u63a5\u8bfb procfs\uff0c\u4e24\u8005\u4e00\u81f4\u624d\u7b97\u6210\u529f\u3002\u5bb9\u5668\u573a\u666f\u989d\u5916\u8981\u6ce8\u610f\uff0c\u591a\u6570 net.* \u53c2\u6570\u5728 network namespace \u5185\u72ec\u7acb\u7ef4\u62a4\uff0c\u5bbf\u4e3b\u673a\u6539\u4e86\u4e0d\u4f1a\u4f20\u5230\u5bb9\u5668\uff0c\u5fc5\u987b\u8fdb\u5bb9\u5668\u518d\u6539\u6216\u5728\u955c\u50cf\u6784\u5efa\u671f\u5199\u5165\u3002\u4e91\u670d\u52a1\u5668\uff08\u57fa\u4e8e\u865a\u62df\u5316\u7684\u5f39\u6027\u8ba1\u7b97\u8d44\u6e90\uff09\u7684\u865a\u62df\u5316\u5c42\u4e00\u822c\u4e0d\u9650\u5236 sysctl\uff0c\u4f46\u90e8\u5206\u6258\u7ba1 Kubernetes \u5e73\u53f0\u4f1a\u62d2\u7edd\u7279\u6743 sysctl\uff0c\u76f8\u5173\u9009\u578b\u53ef\u53c2\u8003 <a href=\"https:\/\/cn.hostease.com\/blog\/guides\/cloud-server-buying-guide\/\">\u4e91\u670d\u52a1\u5668\u9009\u8d2d\u6307\u5357<\/a>\u3002<\/p>\n<h2>\u4e8c\u3001TCP \u8fde\u63a5\u961f\u5217\u4e0e backlog \u8c03\u4f18<\/h2>\n<p>\u9ad8\u5e76\u53d1\u77ed\u8fde\u63a5\u573a\u666f\u4e0b\uff0c<code>net.core.somaxconn<\/code> \u4e0e <code>net.ipv4.tcp_max_syn_backlog<\/code> \u662f\u6700\u5148\u8be5\u770b\u7684\u4e24\u4e2a\u503c\u3002\u524d\u8005\u63a7\u5236 listen \u7cfb\u7edf\u8c03\u7528\u7684\u6700\u5927\u5df2\u5b8c\u6210\u8fde\u63a5\u961f\u5217\u957f\u5ea6\uff0c\u540e\u8005\u63a7\u5236\u534a\u8fde\u63a5\u961f\u5217\u957f\u5ea6\u3002\u9ed8\u8ba4 128 \u4e0e 1024 \u5728\u538b\u6d4b\u91cc\u5f88\u5bb9\u6613\u6ea2\u51fa\uff0c\u6ea2\u51fa\u8868\u73b0\u662f <code>ss -lnt<\/code> \u770b\u5230 Send-Q \u63a5\u8fd1 Recv-Q \u4e0a\u9650\uff0c\u5e94\u7528\u5c42\u4f34\u968f <code>Connection refused<\/code> \u62a5\u9519\u3002<\/p>\n<p>\u63a8\u8350\u914d\u7f6e\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"language-conf\">net.core.somaxconn = 65535\nnet.ipv4.tcp_max_syn_backlog = 65535\nnet.core.netdev_max_backlog = 10000\n<\/code><\/pre>\n<p>\u5149\u6539 sysctl \u8fd8\u4e0d\u591f\uff0c\u5e94\u7528\u5c42\u7684 listen backlog \u5fc5\u987b\u540c\u6b65\u63d0\u5230\u540c\u6837\u91cf\u7ea7\uff0cNginx \u7528 <code>listen 80 backlog=65535;<\/code>\uff0cJava \u5e94\u7528\u901a\u8fc7 <code>ServerSocket<\/code> \u7b2c\u4e8c\u53c2\u6570\u6307\u5b9a\u3002\u4e24\u8005\u53d6\u8f83\u5c0f\u503c\uff0c\u6240\u4ee5\u5e94\u7528\u5c42\u4e0d\u8c03\uff0csysctl \u6539\u4e86\u4e5f\u767d\u6539\u3002\u8fd9\u90e8\u5206\u914d\u5408 <a href=\"https:\/\/cn.hostease.com\/blog\/tutorials\/us-vps-deployment-tutorial-guide\/\">\u7f8e\u56fd VPS \u90e8\u7f72\u6559\u7a0b<\/a> \u4e00\u8d77\u8bfb\u6548\u679c\u66f4\u597d\u3002<\/p>\n<h2>\u4e09\u3001TIME_WAIT \u4e0e\u7aef\u53e3\u590d\u7528<\/h2>\n<p>\u77ed\u8fde\u63a5\u670d\u52a1\uff08API \u7f51\u5173\u3001\u722c\u866b\u5ba2\u6237\u7aef\uff09\u5f88\u5bb9\u6613\u5806\u79ef\u5927\u91cf TIME_WAIT \u72b6\u6001\u8fde\u63a5\uff0c\u5e38\u88ab\u8bef\u5224\u4e3a&#8221;\u5185\u5b58\u6cc4\u6f0f&#8221;\u3002\u672c\u8d28\u662f TCP \u4e3b\u52a8\u5173\u95ed\u65b9\u9ed8\u8ba4\u4fdd\u7559 60 \u79d2\uff082*MSL\uff0cMaximum Segment Lifetime\uff09\u7b49\u5f85\u5bf9\u7aef\u7684\u5ef6\u8fdf\u5206\u7ec4\u3002\u5e38\u89c1\u5904\u7406\u8def\u5f84\u6709\u4e24\u6761\uff1a<\/p>\n<ul>\n<li>\u542f\u7528 <code>net.ipv4.tcp_tw_reuse = 1<\/code> \u8ba9\u65b0\u8fde\u63a5\u5728\u63e1\u624b\u65f6\u590d\u7528 TIME_WAIT \u72b6\u6001\u7684 socket\uff08\u4ec5\u5bf9\u5916\u53d1\u8fde\u63a5\u6709\u6548\uff0c\u4e14\u9700\u5bf9\u7aef\u65f6\u95f4\u6233\u6b63\u786e\uff09<\/li>\n<li>\u8c03\u5c0f <code>net.ipv4.tcp_fin_timeout<\/code> \u5230 15 \u6216 30 \u79d2\uff0c\u7f29\u77ed FIN_WAIT2 \u505c\u7559<\/li>\n<li>\u6269\u5927 <code>net.ipv4.ip_local_port_range<\/code> \u5230 1024 65535 \u8ba9\u672c\u5730\u6e90\u7aef\u53e3\u6c60\u66f4\u5927<\/li>\n<li>\u5173\u95ed <code>net.ipv4.tcp_tw_recycle<\/code>\uff08\u65e7\u5185\u6838\u5df2\u79fb\u9664\uff09\uff0cNAT \u73af\u5883\u4e0b\u5f00\u542f\u4f1a\u5f15\u53d1\u96be\u590d\u73b0\u7684\u8fde\u63a5\u5931\u8d25<\/li>\n<\/ul>\n<p>\u6ce8\u610f tcp_tw_reuse \u4e0e NAT \u7f51\u7edc\u4e0b\u7684\u5ba2\u6237\u7aef\u65f6\u95f4\u6233\u6df7\u4e71\u6709\u51b2\u7a81\uff0c\u5f00\u542f\u524d\u5148\u7528 <code>ss -tan state time-wait | wc -l<\/code> \u8bc4\u4f30\u5b9e\u9645\u5806\u79ef\u91cf\uff0c\u91cf\u7ea7\u5728\u4e07\u7ea7\u4ee5\u4e0b\u5176\u5b9e\u4e0d\u5fc5\u6fc0\u8fdb\u8c03\u6574\u3002<\/p>\n<h2>\u56db\u3001\u62e5\u585e\u63a7\u5236\u4e0e BBR<\/h2>\n<p>Linux 4.9 \u8d77\u628a BBR \u62e5\u585e\u63a7\u5236\u7eb3\u5165\u4e3b\u7ebf\uff0c\u957f\u80a5\u7ba1\u9053\uff08\u9ad8\u5e26\u5bbd\u9ad8\u5ef6\u8fdf\u94fe\u8def\uff0c\u4f8b\u5982\u8de8\u5883\uff09\u4e0b\u541e\u5410\u76f8\u6bd4\u4f20\u7edf cubic \u63d0\u5347\u660e\u663e\u3002\u542f\u7528\u65b9\u5f0f\u53ea\u9700\u8981\u4e24\u884c\uff1a<\/p>\n<pre><code class=\"language-conf\">net.core.default_qdisc = fq\nnet.ipv4.tcp_congestion_control = bbr\n<\/code><\/pre>\n<p>\u5207\u6362\u540e\u7528 <code>sysctl net.ipv4.tcp_congestion_control<\/code> \u786e\u8ba4\uff0c\u518d\u7528 <code>iperf3<\/code> \u8de8\u5883\u62c9\u4e00\u7ec4\u5bf9\u6bd4\u6d4b\u8bd5\u5c31\u80fd\u770b\u5230\u5e26\u5bbd\uff08Bandwidth\uff0c\u5373\u7f51\u7edc\u51fa\u53e3\u6570\u636e\u4f20\u8f93\u901f\u7387\uff0c\u5355\u4f4d Mbps\uff09\u53d8\u5316\u3002BBR \u4e0d\u662f\u94f6\u5f39\uff1a\u7eaf\u4e22\u5305\u9a71\u52a8\u7684\u94fe\u8def\uff08\u4f8b\u5982\u5c40\u90e8\u9ad8\u4e22\u5305\u7684\u5bb6\u5ead\u5bbd\u5e26\uff09\u53cd\u800c\u53ef\u80fd\u8ba9 cubic \u66f4\u7a33\uff1bBBR v3 \u9700\u8981\u66f4\u9ad8\u5185\u6838\u7248\u672c\uff08\u2265 6.4\uff09\uff0c\u751f\u4ea7\u5347\u7ea7\u524d\u5148\u5728\u7070\u5ea6\u673a\u578b\u4e0a\u8dd1\u4e00\u5468\u3002CDN\uff08Content Delivery Network\uff0c\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff09\u56de\u6e90\u94fe\u8def\u4e0a BBR \u901a\u5e38\u53d7\u76ca\u6700\u660e\u663e\uff0c\u76f8\u5173 HTTPS \u538b\u7f29\u4e0e\u8fb9\u7f18\u7b56\u7565\u53ef\u7ee7\u7eed\u770b <a href=\"https:\/\/cn.hostease.com\/blog\/wordpress\/wordpress-w3-total-cache-tuning\/\">W3 Total Cache \u8c03\u4f18\u5b9e\u6218<\/a> \u4e0e <a href=\"https:\/\/cn.hostease.com\/blog\/guides\/wordpress-hk-hosting-guide\/\">WordPress \u9999\u6e2f\u4e3b\u673a\u9009\u8d2d\u6307\u5357<\/a>\u3002<\/p>\n<h2>\u4e94\u3001conntrack \u4e0e\u6587\u4ef6\u63cf\u8ff0\u7b26<\/h2>\n<p>\u9632\u706b\u5899\u5f00\u542f\u540e nf_conntrack \u6a21\u5757\u9ed8\u8ba4\u4f1a\u8ddf\u8e2a\u6bcf\u6761\u6d41\uff0c\u9ed8\u8ba4\u8868\u5927\u5c0f 65536 \u5728\u5c0f\u6d41\u91cf\u4e5f\u591f\u7528\uff0c\u4f46\u9ad8\u5e76\u53d1\u573a\u666f\u4e0b\u6ee1\u8868\u5c31\u4f1a\u4e22\u5305\uff0cdmesg \u51fa\u73b0 <code>nf_conntrack: table full, dropping packet<\/code>\u3002\u5904\u7406\u8def\u5f84\u662f\u540c\u6b65\u63d0\u5347\u8868\u5927\u5c0f\u4e0e\u54c8\u5e0c\u6876\uff1a<\/p>\n<pre><code class=\"language-conf\">net.netfilter.nf_conntrack_max = 1048576\nnet.netfilter.nf_conntrack_buckets = 262144\nnet.netfilter.nf_conntrack_tcp_timeout_established = 600\n<\/code><\/pre>\n<p>\u6ce8\u610f buckets \u662f\u6a21\u5757\u53c2\u6570\u800c\u975e\u7eaf sysctl\uff0c\u5fc5\u987b\u901a\u8fc7 <code>\/etc\/modprobe.d\/conntrack.conf<\/code> \u5199\u5165 <code>options nf_conntrack hashsize=262144<\/code> \u624d\u80fd\u5728\u6a21\u5757\u52a0\u8f7d\u65f6\u751f\u6548\u3002\u6587\u4ef6\u63cf\u8ff0\u7b26\u76f8\u5173\u7684 <code>fs.file-max<\/code> \u4e0e <code>fs.nr_open<\/code> \u5f71\u54cd\u7cfb\u7edf\u603b\u53e5\u67c4\u6570\uff0c\u4e0e systemd \u670d\u52a1\u7684 LimitNOFILE \u914d\u5408\u4f7f\u7528\u3002<\/p>\n<h2>\u516d\u3001\u751f\u6548\u9a8c\u8bc1\u4e0e\u56de\u6eda<\/h2>\n<p>\u8c03\u4f18\u540e\u5fc5\u987b\u6709\u4e00\u7ec4\u53ef\u91cd\u590d\u7684\u9a8c\u8bc1\u6b65\u9aa4\u3002\u5efa\u8bae\u628a\u6240\u6709\u6539\u52a8\u5199\u5230\u72ec\u7acb\u7684 <code>\/etc\/sysctl.d\/99-tuning.conf<\/code>\uff0c\u6bcf\u6b21\u6539\u52a8\u524d\u7528 <code>cp 99-tuning.conf 99-tuning.conf.bak.$(date +%Y%m%d)<\/code> \u5907\u4efd\uff0c\u56de\u6eda\u5c31\u662f\u6062\u590d\u5907\u4efd\u5e76 <code>sysctl --system<\/code>\u3002<\/p>\n<p>\u9a8c\u8bc1\u6e05\u5355\u8981\u5206\u5c42\uff1a\u53c2\u6570\u5c42\u7528 <code>sysctl -a | grep &lt;key&gt;<\/code> \u4e0e <code>cat \/proc\/sys\/...<\/code> \u53cc\u786e\u8ba4\uff1b\u8fde\u63a5\u5c42\u7528 <code>ss -s<\/code> \u770b TCP \u603b\u6570\u3001TIME_WAIT \u5360\u6bd4\uff1bconntrack \u7528 <code>cat \/proc\/sys\/net\/netfilter\/nf_conntrack_count<\/code>\uff1b\u6027\u80fd\u5c42\u7528 <code>iperf3<\/code> \u4e0e <code>wrk<\/code> \u5bf9\u7167\u57fa\u7ebf\u3002\u4efb\u4f55\u4e00\u9879\u4e0e\u9884\u671f\u504f\u5dee\u8d85\u8fc7 10% \u90fd\u5efa\u8bae\u56de\u6eda\u518d\u6392\u67e5\u3002\u66f4\u591a\u670d\u52a1\u5668\u4fa7\u7684\u5b89\u5168\u4e0e\u7ef4\u62a4\u53ef\u7ee7\u7eed\u9605\u8bfb <a href=\"https:\/\/cn.hostease.com\/blog\/category\/wordpress\/\">WordPress \u5206\u7c7b\u4e0b\u7684\u76f8\u5173\u6587\u7ae0<\/a>\u3002<\/p>\n<p>\u53e6\u5916\u4e00\u4e2a\u5bb9\u6613\u5ffd\u89c6\u7684\u70b9\u662f\u53c2\u6570\u4e4b\u95f4\u7684\u4f9d\u8d56\u4e0e\u51b2\u7a81\u3002\u4f8b\u5982 <code>tcp_tw_reuse<\/code> \u5fc5\u987b\u914d\u5408\u65f6\u95f4\u6233\u9009\u9879 <code>tcp_timestamps = 1<\/code> \u624d\u6709\u6548\uff1b<code>tcp_max_syn_backlog<\/code> \u63d0\u5230\u5f88\u9ad8\u4f46 <code>tcp_syncookies<\/code> \u5173\u7740\uff0c\u9047\u5230 SYN flood \u65f6\u4ecd\u4f1a\u4e22\u8bf7\u6c42\u3002\u751f\u4ea7\u73af\u5883\u5efa\u8bae\u628a\u8fd9\u5957\u7ec4\u5408\u53c2\u6570\u56fa\u5316\u5230\u4e00\u4efd runbook \u6587\u6863\u91cc\uff0c\u65b0\u673a\u5668\u521d\u59cb\u5316\u65f6\u4e00\u6b21\u6027\u4e0b\u53d1\uff0c\u907f\u514d\u8fd0\u7ef4\u540c\u5b66\u5404\u6539\u5404\u7684\u5bfc\u81f4\u73af\u5883\u6f02\u79fb\u3002<\/p>\n<p>\u6700\u540e\u662f\u76d1\u63a7\u544a\u8b66\u7684\u5bf9\u63a5\u3002\u5149\u6539 sysctl \u4e0d\u63a5\u76d1\u63a7\u7b49\u4e8e\u76f2\u8c03\uff0c\u5efa\u8bae\u628a <code>ss -s<\/code> \u7684 TCP \u603b\u6570\u3001conntrack \u5360\u7528\u7387\u3001netstat \u91cc\u7684 SYN_RECV \u4e0e TIME_WAIT \u6bd4\u4f8b\u90fd\u63a5\u5230 Prometheus \u4e0e Grafana\uff0c\u8bbe\u5b9a\u9608\u503c\u544a\u8b66\u3002\u4efb\u4f55\u53c2\u6570\u751f\u6548\u540e\u53ea\u8981\u76f8\u5173\u6307\u6807\u663e\u8457\u53d8\u5316\u5c31\u80fd\u5728\u7b2c\u4e00\u65f6\u95f4\u53d1\u73b0\uff0c\u56de\u6eda\u4e5f\u6709\u4e86\u5ba2\u89c2\u4f9d\u636e\u3002<\/p>\n<h2>\u603b\u7ed3\u4e0e\u5efa\u8bae<\/h2>\n<p>sysctl \u8c03\u4f18\u7684\u6838\u5fc3\u4e0d\u662f\u5806\u53c2\u6570\uff0c\u800c\u662f\u5148\u8bc6\u522b\u74f6\u9888\u518d\u9488\u5bf9\u6027\u6539\u3002\u5efa\u8bae\u4f60\u6309\u672c\u6587\u987a\u5e8f\u9010\u6b65\u843d\u5730\uff1a\u5148\u770b\u8fde\u63a5\u961f\u5217\u4e0e backlog\u3001\u518d\u5904\u7406 TIME_WAIT\u3001\u518d\u51b3\u5b9a\u8981\u4e0d\u8981\u4e0a BBR\u3001\u6700\u540e\u624d\u78b0 conntrack \u4e0e\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002\u6bcf\u4e00\u6b65\u90fd\u7528 ss\u3001netstat\u3001dmesg \u9a8c\u8bc1\uff0c\u914d\u4e0a\u56de\u6eda\u811a\u672c\u4e0e\u65e5\u5fd7\u8bb0\u5f55\u3002\u5982\u679c\u4f60\u9700\u8981\u5728\u751f\u4ea7\u505a\u5927\u89c4\u6a21\u8c03\u4f18\uff0c\u53ef\u4ee5\u8003\u8651\u7528 Ansible \u628a sysctl.d \u6587\u4ef6\u7eb3\u5165\u7248\u672c\u7ba1\u7406\uff0c\u914d\u5408 CI \u505a lint \u4e0e\u5192\u70df\u6d4b\u8bd5\uff0c\u6bcf\u4e00\u6b21\u63d0\u4ea4\u90fd\u89e6\u53d1\u4e00\u6b21\u53d7\u63a7\u7684\u7070\u5ea6\u53d1\u5e03\u3002\u603b\u7ed3\u4e00\u4e0b\uff0c\u7a33\u5065\u7684\u5185\u6838\u8c03\u4f18\u6765\u81ea\u5c0f\u6b65\u5feb\u8dd1\u52a0\u6bcf\u6b65\u5ea6\u91cf\uff0c\u800c\u4e0d\u662f\u4e00\u6b21\u6027\u628a\u6240\u6709\u53c2\u6570\u90fd\u62c9\u6ee1\uff0c\u8fd9\u5957\u8282\u594f\u957f\u671f\u8dd1\u4e0b\u6765\u6536\u76ca\u8fdc\u6bd4\u4e00\u6b21\u6027\u5927\u6539\u8981\u7a33\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4ece\u8fde\u63a5\u961f\u5217\u3001TIME_WAIT \u56de\u6536\u5230\u62e5\u585e\u63a7\u5236\uff0c\u7cfb\u7edf\u8bb2\u89e3 Linux sysctl \u5185\u6838\u53c2\u6570\u8c03\u4f18\u7684\u5b9e\u6218\u8def\u5f84\uff0c\u9644 sysctl.d \u6a21\u677f\u4e0e\u56de\u6eda\u65b9\u6848\u3002<\/p>\n","protected":false},"author":2,"featured_media":30694,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4363],"tags":[],"class_list":["post-30695","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-linux"],"aioseo_notices":[],"jetpack_featured_media_url":"https:\/\/cn.hostease.com\/blog\/wp-content\/uploads\/2026\/05\/linux-sysctl-practical-cover.webp","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/posts\/30695","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/comments?post=30695"}],"version-history":[{"count":1,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/posts\/30695\/revisions"}],"predecessor-version":[{"id":30696,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/posts\/30695\/revisions\/30696"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/media\/30694"}],"wp:attachment":[{"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/media?parent=30695"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/categories?post=30695"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/tags?post=30695"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}