install bbr on ubuntu

install_bbr_on_ubuntu.sh

# download linux kenel
wget http://kernel.ubuntu.com/~kernel-ppa/mainline/<version>/linux-headers-<version>_all.deb
wgte http://kernel.ubuntu.com/~kernel-ppa/mainline/<version>/linux-headers-<version>-generic_<version>_arm64.deb
wget http://kernel.ubuntu.com/~kernel-ppa/mainline/<version>/linux-image-<version>-generic_<version>_amd64.deb
 
# intsall linux kenel
sudo dpkg -i *.deb

# unintsall old kenel
dpkg -l|grep linux-image 
apt-get purge <old_kenel_name>

# update grub & reboot
sudo update-grub
sudo reboot

# check kernel version is >= 4.9
uname -r

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

# check these outputs has "bbr"
sysctl net.ipv4.tcp_congestion_control
sysctl net.ipv4.tcp_available_congestion_control
lsmod | grep bbr