1.激活，安装，输入name，密码之后更新可以选择更换清华源。
sudo cp /etc/apt/sources.list /etc/apt/sources.list.copy
sudo vim /etc/apt/sources.list
2. 使用dG全部删除内容，按i变成输入模式，直接粘贴下面的镜像源，然后：wq保存退出
# 默认注释了源码镜像以提高 apt update 速度，如有需要可自行取消注释
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-updates main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-updates main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-backports main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-backports main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-security main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-security main restricted universe multiverse
# 预发布软件源，不建议启用
# deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-proposed main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-proposed main restricted universe multiverse
3. sudo apt-get update
就可以看到清华源镜像运行
4. ssh
sudo apt-get remove openssh-server
sudo apt-get install openssh-server
sudo vim /etc/ssh/sshd_config -----PasswordAuthentication 修改为yes
sudo service ssh --full-restart windows
sudo service ssh --full-restart
