安装BBR

使用root用户登录，运行以下命令：

wget --no-check-certificate https://raw.githubusercontent.com/jacklunee/across/master/bbr.sh && chmod +x bbr.sh && ./bbr.sh

安装完成后，脚本会提示需要重启 VPS，输入 y 并回车后重启。 重启完成后，进入 VPS，验证一下是否成功安装最新内核并开启 TCP BBR，输入以下命令：

uname -r 查看内核版本，含有 4.13 就表示 OK 了

sysctl net.ipv4.tcp_available_congestion_control 返回值一般为： net.ipv4.tcp_available_congestion_control = bbr cubic reno

sysctl net.ipv4.tcp_congestion_control 返回值一般为： net.ipv4.tcp_congestion_control = bbr

sysctl net.core.default_qdisc 返回值一般为： net.core.default_qdisc = fq

lsmod | grep bbr 返回值有 tcp_bbr 模块即说明 bbr 已启动。

卸载方法 vi /etc/sysctl.conf 把net.ipv4.tcp_congestion_control 改成#net.ipv4.tcp_congestion_control 然后reboot

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