使用清华源

清华大学Ubuntu源： https://mirrors.tuna.tsinghua.edu.cn/help/ubuntu/
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复制下面的内容：

  1. # 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
  2. deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy main restricted universe multiverse
  3. # deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy main restricted universe multiverse
  4. deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-updates main restricted universe multiverse
  5. # deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-updates main restricted universe multiverse
  6. deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-backports main restricted universe multiverse
  7. # deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-backports main restricted universe multiverse
  8. deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-security main restricted universe multiverse
  9. # deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-security main restricted universe multiverse
  11. # 预发布软件源，不建议启用
  12. # deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-proposed main restricted universe multiverse
  13. # deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-proposed main restricted universe multiverse

备份sources.list文件

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

编辑sources.list文件

sudo vim /etc/apt/sources.list（可将vim更换为自己喜欢的编辑器）

在文本顶部添加清华源：

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更新源

sudo apt update

更新软件：

sudo apt upgrade