This script enables TCP BBR congestion control. If current linux kernel has no build in BBR support, a newer one is installed.

getBBR.sh

#!/bin/bash

currentver="$(uname -r | cut -d"-" -f1)"
requiredver="4.9.0"
 
 if [ "$(printf "$requiredver\n$currentver" | sort -V | head -n1)" == "$currentver" ] && [ "$currentver" != "$requiredver" ]; then
        echo "No BBR suport in current kernel - installing a newer linux kernel"
        wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.11/linux-headers-4.11.0-041100_4.11.0-041100.201705041534_all.deb
        wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.11/linux-headers-4.11.0-041100-generic_4.11.0-041100.201705041534_amd64.deb
        wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.11/linux-image-4.11.0-041100-generic_4.11.0-041100.201705041534_amd64.deb
        dpkg -i linux-headers-4.11.0-041100* linux-image-4.11.0-041100-generic_4.11.0-041100.201705041534_amd64.deb
        rm *.deb
 else
        echo "TCP BBR supported on current linux kernel - no need to upgrade"
 fi

touch /etc/sysctl.d/11-custom-kernel-bbr.conf
echo "net.core.default_qdisc=fq" >> /etc/sysctl.d/11-custom-kernel-bbr.conf
echo "net.ipv4.tcp_congestion_control=bbr" >> /etc/sysctl.d/11-custom-kernel-bbr.conf
sysctl --system

echo "enjoy the super speed :-D"