Boost Ubuntu 16.04/17.10 Network Performance by Enabling TCP BBR

Install Linux Kernel 4.9 or Above
TCP BBR is supported by Linux since kernel version 4.9. Use the following command to check your Linux kernel version.

uname -r

Simply install the Hardware Enablement Stack (HWE), which provides newer kernel for Ubuntu LTS releases

sudo apt install --install-recommends linux-generic-hwe-16.04
sudo nano /etc/sysctl.conf
sudo sysctl -p