Ubuntu 24.04 换源和以前版本最大的区别在于默认不再主要使用 /etc/apt/sources.list 而是使用 DEB822 格式的/etc/apt/sources.list.d/ubuntu.sources 。一、确认当前版本先确认系统确实是 24.04lsb_release -a输出中 Release 应为 24.04 Codename 应为 noble 。二、备份原始源文件换源前一定要备份改错了可以恢复sudo cp /etc/apt/sources.list.d/ubuntu.sources /etc/apt/sources.list.d/ubuntu.sources.bak如果后面配置出错可以用下面命令恢复:sudo cp /etc/apt/sources.list.d/ubuntu.sources.bak /etc/apt/sources.list.d/ubuntu.sources三、编辑源配置文件打开配置文件sudo vim /etc/apt/sources.list.d/ubuntu.sources四、替换为清华大学镜像源Ubuntu 24.04 推荐使用 DEB822 格式。把文件内容替换为Types: deb URIs: https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ Suites: noble noble-updates noble-backports Components: main restricted universe multiverse Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg Types: deb URIs: https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ Suites: noble-security Components: main restricted universe multiverse Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg五、刷新软件源修改完成后执行sudo apt update sudo apt upgrade -y六、懒人一键替换方式如果你只是想快速把默认源替换成清华镜像可以用 sed sudo sed -i shttp://.*archive.ubuntu.comhttps://mirrors.tuna.tsinghua.edu.cng \ /etc/apt/sources.list.d/ubuntu.sources sudo sed -i shttp://.*security.ubuntu.comhttps://mirrors.tuna.tsinghua.edu.cng \ /etc/apt/sources.list.d/ubuntu.sources执行完后再运行sudo apt update sudo apt upgrade -y