查看版本

lsb_release -a

# Output 》》》》》》
# No LSB modules are available.
# Distributor ID:   Ubuntu
# Description:  Ubuntu 18.04.5 LTS
# Release:  18.04
# Codename: bionic

DNS 修改

vi sudo vi /etc/netplan/01-netcfg.yaml
addresses: [8.8.8.8, 8.8.4.4]


sudo netplan apply

更换国内源

vi /etc/apt/sources.list


------------------------[ 网易 ]-------------------------------
deb http://mirrors.163.com/ubuntu/ bionic main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ bionic-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ bionic-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ bionic-backports main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic-security main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic-updates main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic-backports main restricted universe multiverse


sudo apt-get update

开放端口

sudo apt install ufw
sudo ufw enable
sudo ufw allow 8080/tcp
sudo ufw status