更换ubuntu软件包镜像

ubuntu 版本周期和版本开发代号：https://ubuntu.com/about/release-cycle
清华大学镜像站：https://mirrors.tuna.tsinghua.edu.cn/help/ubuntu/
阿里云镜像站：https://developer.aliyun.com/mirror/ubuntu
网易云镜像站：http://mirrors.163.com/ubuntu/

将 /etc/apt/sources.list中的域名 cn.archive.ubuntu.com替换为上面的域名即可

ubuntu 21.10 配置如下

deb http://mirrors.163.com/ubuntu/ impish main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ impish main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ impish-updates main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ impish-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ impish-backports main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ impish-backports main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ impish-security main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ impish-security main restricted universe multiverse

操作

# 将原来的进行备份
cp /etc/apt/sources.list /etc/apt/sources.list.bak
# 将上面配置覆盖到 /etc/apt/sources.list 文件中即可生效
vim /etc/apt/sources.list
# 更新
 sudo apt update -y

ubuntu 20.10 设置静态ip

编辑配置文件

// 00-installer-config.yaml 每个人的 yaml 文件名字不一样，换成自己的 yaml 文件即可
vim /etc/netplan/00-installer-config.yaml
// 根据下面配置自己的静态ip，保存
// 执行命令应用设置
sudo netplan apply
// 重启系统
sudo reboot

192.168.5.101 是静态 ip
192.168.5.2 是网关：VM查看网关信息

macaddress: 00:0c:29:80:8a:3b 是网卡的MAC地址，可以通过 ip a查询获取

network:
version: 2
renderer: networkd
ethernets: 
  eth0:
    link-local: []
    optional: true
    dhcp4: no
    addresses:
     - 192.168.5.101/24
    routes:  
      - to: default
        via: 192.168.5.2
    match:
        macaddress: 00:0c:29:80:8a:3b
    set-name: eth0
    nameservers:
      addresses: [192.168.5.1,114.114.114.114]
      search: []