开启bbr
echo '# BBR' >> /etc/sysctl.conf
echo 'net.core.default_qdisc = fq' >> /etc/sysctl.conf
echo 'net.ipv4.tcp_congestion_control = bbr' >> /etc/sysctl.conf
sysctl -p
验证是否已经开启
sysctl net.ipv4.tcp_available_congestion_control
sysctl net.ipv4.tcp_congestion_control