echo "net.core.default_qdisc=fq" >> /etc/sysctl.conf
echo "net.ipv4.tcp_congestion_control=bbr" >> /etc/sysctl.conf
sysctl -p如果正常执行之后没有报错的话，需要重启一下系统，让配置生效。
重启之后，执行如下命令查看配置是否成功生效：
lsmod | grep bbr显示如下则成功开启BBR
tcp_bbr 20480 0
Created
March 15, 2019 12:50
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Debian 9 enable BBR
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