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title_diff: "[{\"diffs\":[[1,\"CentOS 7安装bbr教程-Linux运维日志\"]],\"start1\":0,\"start2\":0,\"length1\":0,\"length2\":25}]"
body_diff: "[{\"diffs\":[[1,\"<html>\\\r\\\n<head>\\\r\\\n  <title>CentOS 7安装bbr教程-Linux运维日志</title>\\\r\\\n  <basefont face=\\\"微软雅黑\\\" size=\\\"2\\\" />\\\r\\\n  <meta http-equiv=\\\"Content-Type\\\" content=\\\"text/html;charset=utf-8\\\" />\\\r\\\n  <meta name=\\\"exporter-version\\\" content=\\\"YXBJ Windows/608924 (zh-CN, DDL); Windows/10.0.0 (Win64); EDAMVersion=V2;\\\"/>\\\r\\\n  <style>\\\r\\\n\\tbody, td {\\\r\\\n\\t  font-family: 微软雅黑;\\\r\\\n\\t  font-size: 12pt;\\\r\\\n\\t}\\\r\\\n  </style>\\\r\\\n</head>\\\r\\\n<body>\\\r\\\n<a name=\\\"19132\\\"></a>\\\r\\\n<h1>CentOS 7安装bbr教程-Linux运维日志</h1>\\\r\\\n\\\r\\\n<div><span>\\\n  <div style=\\\"--en-clipped-content:article\\\">\\\n<div><br/></div><div style=\\\"font-size: 16px; display:block; min-width: 100%; position: relative;\\\"> <div style=\\\"font-family:sans-serif;text-size-adjust:100%;box-sizing:border-box;font-size:62.5%;-webkit-tap-highlight-color:rgba(0, 0, 0, 0);\\\"><div style=\\\"box-sizing:border-box;font-family:&quot;Microsoft Yahei&quot;, &quot;Helvetica Neue&quot;, Helvetica, Arial, sans-serif;overflow-x:hidden;font-size:14px;line-height:20px;color:rgb(68, 68, 68);background-color:rgb(238, 238, 238);\\\"><div style=\\\"box-sizing:border-box;background-color:rgb(255, 255, 255);text-align:left;\\\"><div style=\\\"box-sizing:border-box;\\\"><div style=\\\"box-sizing:border-box;overflow:hidden;\\\">\\\n\\t\\t\\t\\t<div style=\\\"display:block;box-sizing:border-box;padding:0px 0px 12px;border-bottom:1px solid rgb(238, 238, 238);margin-bottom:20px;text-align:center;border-bottom-width:1px;\\\">\\\n\\t\\t\\t\\t\\t\\t<div style=\\\"box-sizing:border-box;padding:5px 0px 10px;font-size:12px;text-align:left;\\\"><span style=\\\"box-sizing:border-box;color:rgb(153, 153, 153);font-size:12px;margin-bottom:0px;\\\">当前位置：</span><a href=\\\"https://www.centos.bz/\\\" style=\\\"background:transparent;box-sizing:border-box;color:rgb(68, 68, 68);text-decoration:none;\\\">Linux运维日志</a> <small style=\\\"box-sizing:border-box;font-family:serif;color:rgb(187, 187, 187);margin:0px 2px;font-weight:bold;font-size:12px;\\\">&gt;</small> <a href=\\\"https://www.centos.bz/category/undefine/\\\" style=\\\"background:transparent;box-sizing:border-box;color:rgb(68, 68, 68);text-decoration:none;\\\">未分类</a> <small style=\\\"box-sizing:border-box;font-family:serif;color:rgb(187, 187, 187);margin:0px 2px;font-weight:bold;font-size:12px;\\\">&gt;</small> <span style=\\\"box-sizing:border-box;color:rgb(153, 153, 153);font-size:12px;margin-bottom:0px;\\\">正文</span></div>\\\n\\t\\t\\t\\t\\t\\t<h1 style=\\\"margin:0.67em 0px;box-sizing:border-box;font-family:inherit;font-weight:500;color:inherit;margin-bottom:10px;font-size:26px;line-height:1.2;margin-top:5px;\\\"><a href=\\\"https://www.centos.bz/2018/01/centos-7%e5%ae%89%e8%a3%85bbr%e6%95%99%e7%a8%8b/\\\" style=\\\"background:transparent;box-sizing:border-box;text-decoration:none;color:rgb(68, 68, 68);\\\">CentOS 7安装bbr教程</a></h1>\\\n\\t\\t\\t<ul style=\\\"box-sizing:border-box;overflow:hidden;color:rgb(153, 153, 153);font-size:12px;list-style:none;margin:0px;padding:0px;\\\">\\\n\\t\\t\\t\\t\\t\\t\\t\\t<li style=\\\"box-sizing:border-box;margin-right:20px;display:inline-block;float:none;\\\">sa 发布于 2018-01-17</li>\\\n\\t\\t\\t\\t<li style=\\\"box-sizing:border-box;margin-right:20px;display:inline-block;float:none;\\\">分类：<a href=\\\"https://www.centos.bz/category/undefine/\\\" rel=\\\"category tag\\\" style=\\\"background:transparent;box-sizing:border-box;color:rgb(136, 136, 136);text-decoration:underline;\\\" title=\\\"\\\">未分类</a></li>\\\n\\t\\t\\t\\t<li style=\\\"box-sizing:border-box;margin-right:20px;display:inline-block;float:none;\\\"><span style=\\\"box-sizing:border-box;\\\">阅读(10982)</span></li>\\\n\\t\\t\\t\\t<li style=\\\"box-sizing:border-box;margin-right:20px;display:inline-block;float:none;\\\">评论(0)</li>\\\n\\t\\t\\t\\t<li style=\\\"box-sizing:border-box;margin-right:20px;display:inline-block;float:none;\\\"></li>\\\n\\t\\t\\t</ul>\\\n\\t\\t</div>\\\n\\t\\t\\t\\t<div style=\\\"display:block;box-sizing:border-box;font-size:15px;line-height:25px;overflow-wrap:break-word;\\\">\\\n\\t\\t\\\n\\\n\\t\\t\\t<div style=\\\"box-sizing:border-box;padding:12px;border:1px solid rgb(221, 221, 221);background:rgb(248, 248, 248);line-height:160%;max-width:30%;font-size:100%;position:relative;z-index:1000;margin:0 0 10px 10px;float:right;\\\"><div style=\\\"box-sizing:border-box;margin:0px 0px 3px;padding:0px;font-size:120%;font-weight:bold;\\\">文章目录</div><span style=\\\"box-sizing:border-box;font-size:9pt;\\\">[<a href=\\\"#\\\" style=\\\"background:transparent;box-sizing:border-box;color:rgb(66, 139, 202);text-decoration:underline;\\\">隐藏</a>]</span>\\\n\\\n<ul style=\\\"box-sizing:border-box;padding:0px;list-style:inside none none;font-size:100%;margin:0px;\\\"><li style=\\\"box-sizing:border-box;\\\"><a href=\\\"https://www.centos.bz/2018/01/centos-7%e5%ae%89%e8%a3%85bbr%e6%95%99%e7%a8%8b/#%E5%AE%89%E8%A3%85\\\" style=\\\"background:transparent;box-sizing:border-box;color:rgb(66, 139, 202);text-decoration:underline;\\\" title=\\\"安装\\\"><span style=\\\"box-sizing:border-box;\\\">安装</span></a><ul style=\\\"box-sizing:border-box;padding:0px;font-size:100%;margin:0px;padding-left:1em;list-style:inside none none;\\\"><li style=\\\"box-sizing:border-box;\\\"><a href=\\\"https://www.centos.bz/2018/01/centos-7%e5%ae%89%e8%a3%85bbr%e6%95%99%e7%a8%8b/#CentOS%207.3\\\" style=\\\"background:transparent;box-sizing:border-box;color:rgb(66, 139, 202);text-decoration:underline;\\\" title=\\\"CentOS 7.3\\\"><span style=\\\"box-sizing:border-box;\\\">CentOS 7.3</span></a></li><li style=\\\"box-sizing:border-box;\\\"><a href=\\\"https://www.centos.bz/2018/01/centos-7%e5%ae%89%e8%a3%85bbr%e6%95%99%e7%a8%8b/#CentOS%207.4\\\" style=\\\"background:transparent;box-sizing:border-box;color:rgb(66, 139, 202);text-decoration:underline;\\\" title=\\\"CentOS 7.4\\\"><span style=\\\"box-sizing:border-box;\\\">CentOS 7.4</span></a></li><li style=\\\"box-sizing:border-box;\\\"><a href=\\\"https://www.centos.bz/2018/01/centos-7%e5%ae%89%e8%a3%85bbr%e6%95%99%e7%a8%8b/#%E5%BC%80%E5%90%AFbbr\\\" style=\\\"background:transparent;box-sizing:border-box;color:rgb(66, 139, 202);text-decoration:underline;\\\" title=\\\"开启bbr\\\"><span style=\\\"box-sizing:border-box;\\\">开启bbr</span></a></li></ul></li></ul></div>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\"><img src=\\\":/fa99b14deeb9428eba31c17633ae83f5\\\" type=\\\"image/png\\\" data-filename=\\\"Image.png\\\" height=\\\"95\\\" style=\\\"border:0px;box-sizing:border-box;vertical-align:middle;display:block;height:auto;max-width:100%;margin:0px auto;\\\" width=\\\"300\\\"/></p>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\"><a href=\\\"https://www.centos.bz/tag/google/\\\" style=\\\"background:transparent;box-sizing:border-box;color:rgb(66, 139, 202);text-decoration:underline;\\\">Google</a> 开源了其 TCP BBR 拥塞控制算法，并提交到了 <a href=\\\"https://www.centos.bz/tag/linux/\\\" style=\\\"background:transparent;box-sizing:border-box;color:rgb(66, 139, 202);text-decoration:underline;\\\">Linux</a> 内核，从 4.9 开始，Linux 内核已经用上了该算法。根据以往的传统，Google 总是先在自家的生产环境上线运用后，才会将代码开源，此次也不例外。<br style=\\\"box-sizing:border-box;\\\"/>\\\n根据实地测试，在部署了最新版内核并开启了 TCP BBR 的机器上，网速甚至可以提升好几个数量级。</p>\\\n<h2 style=\\\"box-sizing:border-box;font-family:inherit;margin:16px 0px;padding:10px 0px;border-bottom:1px solid rgb(238, 238, 238);line-height:18px;color:rgb(68, 68, 68);font-size:18px;font-weight:bold;\\\">安装</h2>\\\n<h3 style=\\\"box-sizing:border-box;font-family:inherit;line-height:1.1;margin-top:20px;border-bottom:1px solid rgb(238, 238, 238);margin-bottom:16px;font-size:16px;padding-bottom:0px;color:green;font-weight:bold;\\\">CentOS 7.3</h3>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\">1、yum系统更新（更新到<a href=\\\"https://www.centos.bz/tag/centos/\\\" style=\\\"background:transparent;box-sizing:border-box;color:rgb(66, 139, 202);text-decoration:underline;\\\">CentOS</a> 7.3）</p>\\\n<pre style=\\\"overflow:auto;box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;display:block;line-height:1.42857;border-radius:4px;font-size:13px;overflow-wrap:break-word;font:12px/20px &quot;courier new&quot;;background:rgb(74, 74, 74);padding:10px 20px;margin:20px 0px;color:rgb(248, 248, 212);border:none;\\\"><code style=\\\"box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;font-size:inherit;padding:0px;color:inherit;white-space:pre-wrap;background-color:transparent;border-radius:0px;\\\">yum <a href=\\\"https://www.centos.bz/tag/update/\\\" style=\\\"background:transparent;box-sizing:border-box;color:rgb(66, 139, 202);text-decoration:underline;\\\">update</a>\\\n</code></pre>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\">2、查看系统版本</p>\\\n<pre style=\\\"overflow:auto;box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;display:block;line-height:1.42857;border-radius:4px;font-size:13px;overflow-wrap:break-word;font:12px/20px &quot;courier new&quot;;background:rgb(74, 74, 74);padding:10px 20px;margin:20px 0px;color:rgb(248, 248, 212);border:none;\\\"><code style=\\\"box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;font-size:inherit;padding:0px;color:inherit;white-space:pre-wrap;background-color:transparent;border-radius:0px;\\\">cat /etc/<a href=\\\"https://www.centos.bz/tag/redhat/\\\" style=\\\"background:transparent;box-sizing:border-box;color:rgb(66, 139, 202);text-decoration:underline;\\\">redhat</a>-release\\\n</code></pre>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\">输出如下（release数值大于7.3即可），则表示已升级到7.3</p>\\\n<pre style=\\\"overflow:auto;box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;display:block;line-height:1.42857;border-radius:4px;font-size:13px;overflow-wrap:break-word;font:12px/20px &quot;courier new&quot;;background:rgb(74, 74, 74);padding:10px 20px;margin:20px 0px;color:rgb(248, 248, 212);border:none;\\\"><code style=\\\"box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;font-size:inherit;padding:0px;color:inherit;white-space:pre-wrap;background-color:transparent;border-radius:0px;\\\">CentOS Linux release 7.3.1611 (Core)\\\n</code></pre>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\">3、安装elrepo并升级内核</p>\\\n<pre style=\\\"overflow:auto;box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;display:block;line-height:1.42857;border-radius:4px;font-size:13px;overflow-wrap:break-word;font:12px/20px &quot;courier new&quot;;background:rgb(74, 74, 74);padding:10px 20px;margin:20px 0px;color:rgb(248, 248, 212);border:none;\\\"><code style=\\\"box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;font-size:inherit;padding:0px;color:inherit;white-space:pre-wrap;background-color:transparent;border-radius:0px;\\\">rpm --<a href=\\\"https://www.centos.bz/tag/import/\\\" style=\\\"background:transparent;box-sizing:border-box;color:rgb(66, 139, 202);text-decoration:underline;\\\">import</a> <a href=\\\"https://www.centos.bz/tag/https/\\\" style=\\\"background:transparent;box-sizing:border-box;color:rgb(66, 139, 202);text-decoration:underline;\\\">https</a>://www.elrepo.org/RPM-GPG-KEY-elrepo.org\\\nrpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm\\\nyum --enablerepo=elrepo-kernel install kernel-ml -y\\\n</code></pre>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\">正常情况下将输出如下信息：</p>\\\n<pre style=\\\"overflow:auto;box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;display:block;line-height:1.42857;border-radius:4px;font-size:13px;overflow-wrap:break-word;font:12px/20px &quot;courier new&quot;;background:rgb(74, 74, 74);padding:10px 20px;margin:20px 0px;color:rgb(248, 248, 212);border:none;\\\"><code style=\\\"box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;font-size:inherit;padding:0px;color:inherit;white-space:pre-wrap;background-color:transparent;border-radius:0px;\\\">Transaction Summary\\\n================================================================================\\\nInstall  1 Package\\\n<a href=\\\"https://www.centos.bz/tag/total/\\\" style=\\\"background:transparent;box-sizing:border-box;color:rgb(66, 139, 202);text-decoration:underline;\\\">Total</a> download size: 39 M\\\nInstalled size: 169 M\\\nDownloading packages:\\\nkernel-ml-4.9.0-1.el7.elrepo.x86_64.rpm                    |  39 MB   00:00\\\nRunning transaction check\\\nRunning transaction test\\\nTransaction test succeeded\\\nRunning transaction\\\nWarning: RPMDB altered outside of yum.\\\n  Installing : kernel-ml-4.9.0-1.el7.elrepo.x86_64                          1/1\\\n  Verifying  : kernel-ml-4.9.0-1.el7.elrepo.x86_64                          1/1\\\nInstalled:\\\n  kernel-ml.x86_64 0:4.9.0-1.el7.elrepo\\\nComplete!\\\n</code></pre>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\">4、更新grub文件并重启（reboot后，ssh会断开，稍等一会儿重新连接）</p>\\\n<pre style=\\\"overflow:auto;box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;display:block;line-height:1.42857;border-radius:4px;font-size:13px;overflow-wrap:break-word;font:12px/20px &quot;courier new&quot;;background:rgb(74, 74, 74);padding:10px 20px;margin:20px 0px;color:rgb(248, 248, 212);border:none;\\\"><code style=\\\"box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;font-size:inherit;padding:0px;color:inherit;white-space:pre-wrap;background-color:transparent;border-radius:0px;\\\">egrep ^menuentry /etc/<a href=\\\"https://www.centos.bz/tag/grub2/\\\" style=\\\"background:transparent;box-sizing:border-box;color:rgb(66, 139, 202);text-decoration:underline;\\\">grub2</a>.cfg | cut -f 2 -d \\\\'\\\ngrub2-set-default 0\\\nreboot\\\n</code></pre>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\">5、开机后查看内核是否已更换为4.9</p>\\\n<pre style=\\\"overflow:auto;box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;display:block;line-height:1.42857;border-radius:4px;font-size:13px;overflow-wrap:break-word;font:12px/20px &quot;courier new&quot;;background:rgb(74, 74, 74);padding:10px 20px;margin:20px 0px;color:rgb(248, 248, 212);border:none;\\\"><code style=\\\"box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;font-size:inherit;padding:0px;color:inherit;white-space:pre-wrap;background-color:transparent;border-radius:0px;\\\">uname -r\\\n</code></pre>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\">输出如下内容则表示内核4.9已经启动了（数值大于4.9即可）</p>\\\n<pre style=\\\"overflow:auto;box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;display:block;line-height:1.42857;border-radius:4px;font-size:13px;overflow-wrap:break-word;font:12px/20px &quot;courier new&quot;;background:rgb(74, 74, 74);padding:10px 20px;margin:20px 0px;color:rgb(248, 248, 212);border:none;\\\"><code style=\\\"box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;font-size:inherit;padding:0px;color:inherit;white-space:pre-wrap;background-color:transparent;border-radius:0px;\\\">4.9.0-1.el7.elrepo.x86_64\\\n</code></pre>\\\n<h3 style=\\\"box-sizing:border-box;font-family:inherit;line-height:1.1;margin-top:20px;border-bottom:1px solid rgb(238, 238, 238);margin-bottom:16px;font-size:16px;padding-bottom:0px;color:green;font-weight:bold;\\\">CentOS 7.4</h3>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\">导入 elrepo 软件源的 GPG 公钥</p>\\\n<pre style=\\\"overflow:auto;box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;display:block;line-height:1.42857;border-radius:4px;font-size:13px;overflow-wrap:break-word;font:12px/20px &quot;courier new&quot;;background:rgb(74, 74, 74);padding:10px 20px;margin:20px 0px;color:rgb(248, 248, 212);border:none;\\\"><code style=\\\"box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;font-size:inherit;padding:0px;color:inherit;white-space:pre-wrap;background-color:transparent;border-radius:0px;\\\">rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org\\\n</code></pre>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\">导入 elrepo 软件源</p>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\">说明：该地址可以自动下载该源的最新的软件列表，无需修改地址。</p>\\\n<pre style=\\\"overflow:auto;box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;display:block;line-height:1.42857;border-radius:4px;font-size:13px;overflow-wrap:break-word;font:12px/20px &quot;courier new&quot;;background:rgb(74, 74, 74);padding:10px 20px;margin:20px 0px;color:rgb(248, 248, 212);border:none;\\\"><code style=\\\"box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;font-size:inherit;padding:0px;color:inherit;white-space:pre-wrap;background-color:transparent;border-radius:0px;\\\">rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm\\\n</code></pre>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\">下载并安装新的内核</p>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\">启用软件源并下载安装最新稳定版内核</p>\\\n<pre style=\\\"overflow:auto;box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;display:block;line-height:1.42857;border-radius:4px;font-size:13px;overflow-wrap:break-word;font:12px/20px &quot;courier new&quot;;background:rgb(74, 74, 74);padding:10px 20px;margin:20px 0px;color:rgb(248, 248, 212);border:none;\\\"><code style=\\\"box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;font-size:inherit;padding:0px;color:inherit;white-space:pre-wrap;background-color:transparent;border-radius:0px;\\\">yum -y --enablerepo=elrepo-kernel install kernel-ml\\\n</code></pre>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\">设定 Grub 默认启动新内核</p>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\">说明：如果手动修改过 Grub 的配置文件，以下命令可能无法执行成功。请自行修改 Grub 配置文件。</p>\\\n<pre style=\\\"overflow:auto;box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;display:block;line-height:1.42857;border-radius:4px;font-size:13px;overflow-wrap:break-word;font:12px/20px &quot;courier new&quot;;background:rgb(74, 74, 74);padding:10px 20px;margin:20px 0px;color:rgb(248, 248, 212);border:none;\\\"><code style=\\\"box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;font-size:inherit;padding:0px;color:inherit;white-space:pre-wrap;background-color:transparent;border-radius:0px;\\\">grub2-set-default 0\\\n</code></pre>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\">使用新的内核重启</p>\\\n<pre style=\\\"overflow:auto;box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;display:block;line-height:1.42857;border-radius:4px;font-size:13px;overflow-wrap:break-word;font:12px/20px &quot;courier new&quot;;background:rgb(74, 74, 74);padding:10px 20px;margin:20px 0px;color:rgb(248, 248, 212);border:none;\\\"><code style=\\\"box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;font-size:inherit;padding:0px;color:inherit;white-space:pre-wrap;background-color:transparent;border-radius:0px;\\\">reboot\\\n</code></pre>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\">检查设置 &amp; 删除旧的内核</p>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\">查看当前系统的内核版本号</p>\\\n<pre style=\\\"overflow:auto;box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;display:block;line-height:1.42857;border-radius:4px;font-size:13px;overflow-wrap:break-word;font:12px/20px &quot;courier new&quot;;background:rgb(74, 74, 74);padding:10px 20px;margin:20px 0px;color:rgb(248, 248, 212);border:none;\\\"><code style=\\\"box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;font-size:inherit;padding:0px;color:inherit;white-space:pre-wrap;background-color:transparent;border-radius:0px;\\\">uname -r\\\n</code></pre>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\">如果输出是 4.10 以上的版本，说明安装成功。</p>\\\n<pre style=\\\"overflow:auto;box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;display:block;line-height:1.42857;border-radius:4px;font-size:13px;overflow-wrap:break-word;font:12px/20px &quot;courier new&quot;;background:rgb(74, 74, 74);padding:10px 20px;margin:20px 0px;color:rgb(248, 248, 212);border:none;\\\"><code style=\\\"box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;font-size:inherit;padding:0px;color:inherit;white-space:pre-wrap;background-color:transparent;border-radius:0px;\\\">4.14.13-1.el7.elrepo.x86_64\\\n</code></pre>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\">删除旧内核</p>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\">说明：删除旧内核的目的是为了防止 yum 更新旧版内核之后覆盖了 grub 默认启动项</p>\\\n<pre style=\\\"overflow:auto;box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;display:block;line-height:1.42857;border-radius:4px;font-size:13px;overflow-wrap:break-word;font:12px/20px &quot;courier new&quot;;background:rgb(74, 74, 74);padding:10px 20px;margin:20px 0px;color:rgb(248, 248, 212);border:none;\\\"><code style=\\\"box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;font-size:inherit;padding:0px;color:inherit;white-space:pre-wrap;background-color:transparent;border-radius:0px;\\\">yum -y remove kernel kernel-tools\\\n</code></pre>\\\n<h3 style=\\\"box-sizing:border-box;font-family:inherit;line-height:1.1;margin-top:20px;border-bottom:1px solid rgb(238, 238, 238);margin-bottom:16px;font-size:16px;padding-bottom:0px;color:green;font-weight:bold;\\\">开启bbr</h3>\\\n<pre style=\\\"overflow:auto;box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;display:block;line-height:1.42857;border-radius:4px;font-size:13px;overflow-wrap:break-word;font:12px/20px &quot;courier new&quot;;background:rgb(74, 74, 74);padding:10px 20px;margin:20px 0px;color:rgb(248, 248, 212);border:none;\\\"><code style=\\\"box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;font-size:inherit;padding:0px;color:inherit;white-space:pre-wrap;background-color:transparent;border-radius:0px;\\\">vim /etc/sysctl.conf\\\n</code></pre>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\">添加如下内容</p>\\\n<pre style=\\\"overflow:auto;box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;display:block;line-height:1.42857;border-radius:4px;font-size:13px;overflow-wrap:break-word;font:12px/20px &quot;courier new&quot;;background:rgb(74, 74, 74);padding:10px 20px;margin:20px 0px;color:rgb(248, 248, 212);border:none;\\\"><code style=\\\"box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;font-size:inherit;padding:0px;color:inherit;white-space:pre-wrap;background-color:transparent;border-radius:0px;\\\">net.core.default_qdisc = fq\\\nnet.ipv4.tcp_congestion_control = bbr\\\n</code></pre>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\">加载系统参数（正常情况下会输出我们之前加入的内容）</p>\\\n<pre style=\\\"overflow:auto;box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;display:block;line-height:1.42857;border-radius:4px;font-size:13px;overflow-wrap:break-word;font:12px/20px &quot;courier new&quot;;background:rgb(74, 74, 74);padding:10px 20px;margin:20px 0px;color:rgb(248, 248, 212);border:none;\\\"><code style=\\\"box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;font-size:inherit;padding:0px;color:inherit;white-space:pre-wrap;background-color:transparent;border-radius:0px;\\\">sysctl -p\\\n</code></pre>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\">验证bbr是否已经开启</p>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\">a.若</p>\\\n<pre style=\\\"overflow:auto;box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;display:block;line-height:1.42857;border-radius:4px;font-size:13px;overflow-wrap:break-word;font:12px/20px &quot;courier new&quot;;background:rgb(74, 74, 74);padding:10px 20px;margin:20px 0px;color:rgb(248, 248, 212);border:none;\\\"><code style=\\\"box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;font-size:inherit;padding:0px;color:inherit;white-space:pre-wrap;background-color:transparent;border-radius:0px;\\\">sysctl net.ipv4.tcp_available_congestion_control\\\n</code></pre>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\">返回</p>\\\n<pre style=\\\"overflow:auto;box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;display:block;line-height:1.42857;border-radius:4px;font-size:13px;overflow-wrap:break-word;font:12px/20px &quot;courier new&quot;;background:rgb(74, 74, 74);padding:10px 20px;margin:20px 0px;color:rgb(248, 248, 212);border:none;\\\"><code style=\\\"box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;font-size:inherit;padding:0px;color:inherit;white-space:pre-wrap;background-color:transparent;border-radius:0px;\\\">net.ipv4.tcp_available_congestion_control = bbr cubic reno\\\n</code></pre>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\">则成功</p>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\">b.若</p>\\\n<pre style=\\\"overflow:auto;box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;display:block;line-height:1.42857;border-radius:4px;font-size:13px;overflow-wrap:break-word;font:12px/20px &quot;courier new&quot;;background:rgb(74, 74, 74);padding:10px 20px;margin:20px 0px;color:rgb(248, 248, 212);border:none;\\\"><code style=\\\"box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;font-size:inherit;padding:0px;color:inherit;white-space:pre-wrap;background-color:transparent;border-radius:0px;\\\">lsmod | grep bbr\\\n</code></pre>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;text-indent:0px;\\\">返回形如如下形式的信息即成功。</p>\\\n<pre style=\\\"overflow:auto;box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;display:block;line-height:1.42857;border-radius:4px;font-size:13px;overflow-wrap:break-word;font:12px/20px &quot;courier new&quot;;background:rgb(74, 74, 74);padding:10px 20px;margin:20px 0px;color:rgb(248, 248, 212);border:none;\\\"><code style=\\\"box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace;font-size:inherit;padding:0px;color:inherit;white-space:pre-wrap;background-color:transparent;border-radius:0px;\\\">tcp_bbr                16384  1\\\ntcp_bbr                20480  0\\\n</code></pre>\\t\\t\\t        \\t<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;margin-bottom:16px;clear:both;background-color:rgb(242, 242, 242);font-size:12px;color:rgb(153, 153, 153);padding:6px 15px 5px;border-radius:2px;text-align:center;margin-top:10px;text-indent:0px;\\\">原文出处：vpswe -&gt; <a href=\\\"http://www.vpswe.com/linux/651.html\\\" rel=\\\"nofollow\\\" style=\\\"background:transparent;box-sizing:border-box;color:rgb(153, 153, 153);text-decoration:none;\\\">http://www.vpswe.com/linux/651.html</a></p>\\t\\t</div>\\\n\\t\\t           <div style=\\\"box-sizing:border-box;height:110px;position:relative;text-align:center;\\\">\\\n            <p style=\\\"box-sizing:border-box;margin:0px 0px 10px;\\\"><a href=\\\"#\\\" style=\\\"box-sizing:border-box;border-radius:50%;display:inline-block;font-size:18px;height:75px;line-height:75px;text-align:center;width:75px;background:none 0px 0px repeat scroll rgb(240, 99, 99);text-decoration:none;color:rgb(255, 255, 255);\\\">打赏</a></p>\\\n<p style=\\\"box-sizing:border-box;margin:0px 0px 10px;\\\">如果此文对你有所帮助，请随意打赏鼓励作者^_^</p>\\\n            \\\n        </div>\\\n       \\\n\\t\\t\\t\\t\\\n\\t\\t<div style=\\\"box-sizing:border-box;margin-bottom:30px;text-align:right;\\\">\\\n\\t\\t\\t标签：<a href=\\\"https://www.centos.bz/tag/bbr/\\\" rel=\\\"tag\\\" style=\\\"background:transparent;box-sizing:border-box;display:inline-block;padding:3px 8px 2px;margin:0px 4px 4px 0px;font-size:12px;background-color:rgb(255, 94, 82);opacity:0.85;color:rgb(255, 255, 255);text-decoration:none;\\\" title=\\\"\\\">bbr</a><a href=\\\"https://www.centos.bz/tag/centos/\\\" rel=\\\"tag\\\" style=\\\"background:transparent;box-sizing:border-box;display:inline-block;padding:3px 8px 2px;margin:0px 4px 4px 0px;font-size:12px;background-color:rgb(255, 94, 82);opacity:0.85;color:rgb(255, 255, 255);text-decoration:none;\\\" title=\\\"\\\">CentOS</a>\\t\\t</div>\\\n\\t\\t<div style=\\\"display:block;box-sizing:border-box;overflow:hidden;margin-bottom:30px;font-size:14px;color:rgb(187, 187, 187);clear:both;\\\">\\\n\\t\\t\\t<span style=\\\"box-sizing:border-box;float:left;position:relative;width:50%;\\\">上一篇<br style=\\\"box-sizing:border-box;\\\"/><a href=\\\"https://www.centos.bz/2018/01/ubuntu-16-04-mysql%e5%ae%89%e8%a3%85%e9%85%8d%e7%bd%ae/\\\" rel=\\\"prev\\\" style=\\\"background:transparent;box-sizing:border-box;text-decoration:none;margin-right:10px;display:inline-block;color:rgb(153, 153, 153);\\\">Ubuntu 16.04 mysql安装配置</a></span>\\\n\\t\\t\\t<span style=\\\"box-sizing:border-box;position:relative;width:50%;text-align:right;float:right;\\\"><span style=\\\"text-align:right;position:absolute;left:0px;top:0px;height:100%;display:block;width:1px;background-color:rgb(238, 238, 238);\\\"></span>下一篇<br style=\\\"box-sizing:border-box;\\\"/><a href=\\\"https://www.centos.bz/2018/01/yarn%e4%bd%bf%e7%94%a8cgroup%e9%9a%94%e7%a6%bb%e8%b5%84%e6%ba%90/\\\" rel=\\\"next\\\" style=\\\"background:transparent;box-sizing:border-box;text-decoration:none;display:inline-block;color:rgb(153, 153, 153);margin-left:10px;margin-right:0px;\\\">yarn使用cgroup隔离资源</a></span>\\\n\\t\\t</div>\\\n\\t\\t\\t\\t<div style=\\\"box-sizing:border-box;overflow:hidden;\\\"><h3 style=\\\"box-sizing:border-box;font-family:inherit;font-weight:500;color:inherit;position:relative;margin:0px;border-bottom:2px solid rgb(238, 238, 238);line-height:32px;font-size:20px;\\\"><strong style=\\\"box-sizing:border-box;border-bottom:2px solid rgb(255, 94, 82);display:inline-block;position:relative;bottom:-2px;font-weight:normal;\\\">相关推荐</strong></h3><ul style=\\\"box-sizing:border-box;margin-top:0px;margin-bottom:10px;list-style:none;padding:15px 0px 0px;overflow:hidden;margin-right:-10px;\\\"><li style=\\\"box-sizing:border-box;display:inline-block;vertical-align:top;width:25%;margin-bottom:20px;\\\"><a href=\\\"https://www.centos.bz/2019/07/centos7%e4%b8%adlvm%e5%88%86%e5%8c%ba%e7%9a%84%e5%88%9b%e5%bb%ba%e4%b8%8e%e6%89%a9%e5%b1%95/\\\" style=\\\"background:transparent;box-sizing:border-box;text-decoration:none;margin-right:10px;display:block;color:rgb(102, 102, 102);\\\"><span style=\\\"box-sizing:border-box;\\\"><img src=\\\":/5daf31d604c54a31b9b35260a37117b3\\\" 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data-filename=\\\"thumbnail.png\\\" height=\\\"156\\\" style=\\\"border:0px;box-sizing:border-box;vertical-align:middle;max-width:100%;width:100%;margin-bottom:5px;height:156px;\\\" width=\\\"194\\\"/></span>CentOS/Debian/Ubuntu系统一键锐速+更换内核脚本</a></li><li style=\\\"box-sizing:border-box;display:inline-block;vertical-align:top;width:25%;margin-bottom:20px;\\\"><a href=\\\"https://www.centos.bz/2019/02/centos%e9%83%a8%e7%bd%b2%e9%83%a8%e7%bd%b2edusoho/\\\" style=\\\"background:transparent;box-sizing:border-box;text-decoration:none;margin-right:10px;display:block;color:rgb(102, 102, 102);\\\"><span style=\\\"box-sizing:border-box;\\\"><img src=\\\":/f3ec63f9f041419b84a65a8b0f9290cc\\\" type=\\\"image/png\\\" data-filename=\\\"thumbnail.png\\\" height=\\\"156\\\" style=\\\"border:0px;box-sizing:border-box;vertical-align:middle;max-width:100%;width:100%;margin-bottom:5px;height:156px;\\\" width=\\\"194\\\"/></span>CentOS部署部署Edusoho</a></li><li style=\\\"box-sizing:border-box;display:inline-block;vertical-align:top;width:25%;margin-bottom:20px;\\\"><a href=\\\"https://www.centos.bz/2019/02/centos-7%e5%ae%89%e8%a3%85deluge/\\\" style=\\\"background:transparent;box-sizing:border-box;text-decoration:none;margin-right:10px;display:block;color:rgb(102, 102, 102);\\\"><img src=\\\":/f58883047de04a0ba88325e1539e056c\\\" type=\\\"image/png\\\" data-filename=\\\"1-1-3.png\\\" height=\\\"156\\\" style=\\\"border:0px;box-sizing:border-box;vertical-align:middle;max-width:100%;width:100%;margin-bottom:5px;height:156px;\\\" width=\\\"194\\\"/>CentOS 7安装Deluge</a></li></ul></div>\\t\\t\\t\\t\\t\\t\\t</div></div></div></div></div></div>\\\n</div>\\\n</span>\\\n</div></body></html>\\u0000\"]],\"start1\":0,\"start2\":0,\"length1\":0,\"length2\":35748}]"
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