if grep -q -E '^shahanbbr$' /etc/sysctl.conf; then
    echo "all good, do nothing";
else
    echo "#shahanbbr
net.ipv4.tcp_window_scaling = 1
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.ipv4.tcp_rmem = 4096 87380 16777216
net.ipv4.tcp_wmem = 4096 16384 16777216
net.ipv4.tcp_low_latency = 1
net.ipv4.tcp_slow_start_after_idle = 0
net.core.default_qdisc = fq
net.ipv4.tcp_congestion_control = bbr" >> /etc/sysctl.conf
fi
clear
echo "BBR Installed . "