Turn on the built-in TCP BBR to Increase the Internet Speed

If the system’s built-in kernel is higher than 4.9, BBR is already included by default.

Steps:

Use the root privilege to run the following code

uname -r // The kernel version needs to be higher than 4.9.

Turn on BBR

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

Make changes effective

sysctl -p

Execute the following command, if the result contains bbr, it means that your kernel has been enabled bbr.

sysctl net.ipv4.tcp_available_congestion_control

Note: You can also execute the following command, if the result contains bbr, it also proves that your kernel has been enabled bbr.

lsmod | grep bbr