如果使用的是Debian 9、Debian 10、Ubuntu 18.04、Ubuntu 18.10等内核高于4.9版本的系统，均可以使用此方法开启BBR加速，若你使用了Ubuntu 19.04的系统无需开启，系统默认就开启了。

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

查看是否已开启BBR

sysctl net.ipv4.tcp_available_congestion_control

若得到返回值带有bbr则成功开启，如

启用 IPv6 功能

找到 VPS 正在使用的 VCN

点击进入 VCN 编辑页面，切换到 CIDR Blocks 选项卡，点击 Add IPv6 CIDR Block

在弹窗中选择启用 IPv6 功能，那么此时你会获得一段 /56 的 IP 地址

创建 IPv6 子网
我们获取到的是 /56 的子网，想要分配给 VPS 那么就需要对这段地址重新划分。

切换到 Subnets 选项卡，编辑当前的 Subnet

在弹窗中勾选 IPv6，并输入 00-FF 之间的十六进制数，用来划分 /64 子网

创建 IPv6 防火墙规则
切换到 Security Lists 选项卡，点击当前的安全规则，进入编辑界面

分别设置出向入向规则，这里我选择全部放行，CIDR选择 ::/0


创建 IPv6 默认路由
切换到 Route Tables 选项卡，点击需要编辑的路由表

点击 Add Route Rules 添加一条路由，设置如下，CIDR Block 使用 ::/0

为 VPS 实例分配 IPv6 地址
在 VPS 实例中选择 Attached VNICs 选项卡，点击 View details

接着切换到 IPv6 Addresses 选项卡，点击 Assign IPv6 Address

1）网卡。 Oracle Linux 7.9的网卡名称是：enp0s3 （和上文中是不一样的，使用 ifconfig 可见）

2）Oracle Linux 7.9 已经启动 IPv6模块，但是内核配置没有启用！

执行以下命令！

echo "net.ipv6.conf.all.disable_ipv6=0" >> /etc/sysctl.conf

将配置生效！

sysctl -p

获取IPv6！

dhclient -6 enp0s3

查看IP!

ip addr

如果重启后IPv6获取不到？添加开机启动

那么执行下面的脚本。把获取IPv6的命令写到开机启动！

chmod +x /etc/rc.d/rc.local
echo "dhclient -6 enp0s3" >> /etc/rc.d/rc.local

Ubantu系统简单一些！面板操作完成，重启服务器即可！

Debian系统，面板操作完成！需要修改文件！

echo "iface ens3 inet6 dhcp" >> /etc/network/interfaces

然后重启服务器即可！

reboot

Oracle Linux 8 系统，替换下面命令中的 ipv6地址 为你服务器实际分配的地址！

sudo ip -6 addr add ipv6地址 dev enp0s3

如果想换源，执行 cat /dev/null > /etc/apt/sources.list 后再自行加源

清华源：

cat > /etc/apt/sources.list <<EOF
deb https://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye main contrib non-free
deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye main contrib non-free
deb https://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye-updates main contrib non-free
deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye-updates main contrib non-free
deb https://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye-backports main contrib non-free
deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye-backports main contrib non-free
deb https://mirrors.tuna.tsinghua.edu.cn/debian-security bullseye-security main contrib non-free
deb-src https://mirrors.tuna.tsinghua.edu.cn/debian-security bullseye-security main contrib non-free
EOF

阿里源：

cat > /etc/apt/sources.list <<EOF
deb http://mirrors.aliyun.com/debian/ bullseye main non-free contrib
deb http://mirrors.aliyun.com/debian/ bullseye-updates main non-free contrib
deb http://mirrors.aliyun.com/debian/ bullseye-backports main non-free contrib
deb-src http://mirrors.aliyun.com/debian/ bullseye main non-free contrib
deb-src http://mirrors.aliyun.com/debian/ bullseye-updates main non-free contrib
deb-src http://mirrors.aliyun.com/debian/ bullseye-backports main non-free contrib
deb http://mirrors.aliyun.com/debian-security/ bullseye-security main non-free contrib
deb-src http://mirrors.aliyun.com/debian-security/ bullseye-security main non-free contrib
EOF

华为源：

cat > /etc/apt/sources.list <<EOF
deb https://mirrors.huaweicloud.com/debian/ buster main contrib non-free
deb https://mirrors.huaweicloud.com/debian/ buster-updates main contrib non-free
deb https://mirrors.huaweicloud.com/debian/ buster-backports main contrib non-free
deb https://mirrors.huaweicloud.com/debian-security/ buster/updates main contrib non-free
deb-src https://mirrors.huaweicloud.com/debian/ buster main contrib non-free
deb-src https://mirrors.huaweicloud.com/debian/ buster-updates main contrib non-free
deb-src https://mirrors.huaweicloud.com/debian/ buster-backports main contrib non-free 
EOF

中科大源：

cat > /etc/apt/sources.list <<EOF
deb https://mirrors.ustc.edu.cn/debian/ buster main contrib non-free
deb https://mirrors.ustc.edu.cn/debian/ buster-updates main contrib non-free
deb https://mirrors.ustc.edu.cn/debian/ buster-backports main contrib non-free
deb https://mirrors.ustc.edu.cn/debian-security/ buster/updates main contrib non-free
deb-src https://mirrors.ustc.edu.cn/debian/ buster main contrib non-free
deb-src https://mirrors.ustc.edu.cn/debian/ buster-updates main contrib non-free
deb-src https://mirrors.ustc.edu.cn/debian/ buster-backports main contrib non-free
deb-src https://mirrors.ustc.edu.cn/debian-security/ buster/updates main contrib non-free
EOF

更新

apt-get update 
apt-get upgrade

清华源无ssl

cat > /etc/apt/sources.list <<EOF
deb http://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye main contrib non-free
deb-src http://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye main contrib non-free
deb http://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye-updates main contrib non-free
deb-src http://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye-updates main contrib non-free
deb http://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye-backports main contrib non-free
deb-src http://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye-backports main contrib non-free
deb http://mirrors.tuna.tsinghua.edu.cn/debian-security bullseye-security main contrib non-free
deb-src http://mirrors.tuna.tsinghua.edu.cn/debian-security bullseye-security main contrib non-free
EOF

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