Ubuntu系统初始化

请您在正式使用前运行如下命令，请严格按照顺序执行（只针对国内机器，国外机器自行判断），一定要开启bbr：

只针对Ubuntu22.04系统

1、更改DNS为8.8.8.8 114.114.114.114

在resolv.conf文件中更新DNS

vi /etc/resolv.conf

nameserver 8.8.8.8

nameserver 114.114.114.114

重启网络

sudo netplan apply

2、更换为阿里云源

sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak

vi /etc/apt/sources.list

将里面的全部内容替换为下方内容：

deb http://mirrors.aliyun.com/ubuntu/ jammy main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ jammy-security main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ jammy-updates main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ jammy-proposed main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ jammy-backports main restricted universe multiverse

同步软件源

sudo apt-get update

3、开启bbr

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

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

sysctl -p

sysctl net.ipv4.tcp_available_congestion_control

lsmod | grep bbr

重启

reboot