bash <(wget -qO- https://raw.githubusercontent.com/fscarmen/sing-box/main/sing-box.sh)

echo "net.core.default_qdisc=fq"  >>  /etc/sysctl.conf
echo "net.ipv4.tcp_congestion_control=bbr"  >>  /etc/sysctl.conf
sysctl -p
lsmod | grep bbr

sysctl net.ipv4.tcp_congestion_control net.core.default_qdisc