ubuntu 升級到5.1kernel，打開bbr

apt-get -f install

wget -c https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.1/linux-headers-5.1.0-050100_5.1.0-050100.201905052130_all.deb

wget -c https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.1/linux-headers-5.1.0-050100-generic_5.1.0-050100.201905052130_amd64.deb

wget -c https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.1/linux-image-unsigned-5.1.0-050100-generic_5.1.0-050100.201905052130_amd64.deb

wget -c https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.1/linux-modules-5.1.0-050100-generic_5.1.0-050100.201905052130_amd64.deb

sudo dpkg -i *.deb


# 啓動順序
grep menuentry /boot/grub/grub.cfg

echo "net.core.default_qdisc=fq" >> /etc/sysctl.conf
echo "net.ipv4.tcp_congestion_control=bbr" >> /etc/sysctl.conf

sysctl -p

# 查看內核是否已開啓BBR
sysctl net.ipv4.tcp_available_congestion_control


# 顯示如下即已開啓：
# sysctl net.ipv4.tcp_available_congestion_control
net.ipv4.tcp_available_congestion_control = bbr cubic reno


# 查看BBR是否啓動
lsmod | grep bbr