Ubuntu 24.04 不再使用 source.list 来配置源

[aflyhorse]

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当前版本的 /etc/apt/sources.list 内容为

# Ubuntu sources have moved to the /etc/apt/sources.list.d/ubuntu.sources
# file, which uses the deb822 format. Use deb822-formatted .sources files
# to manage package sources in the /etc/apt/sources.list.d/ directory.
# See the sources.list(5) manual page for details.

即，配置改为编辑 /etc/apt/sources.list.d/ubuntu.sources 将里面的两行 URIs: 均改为 https://mirror.sjtu.edu.cn/ubuntu 希望以适当的方式更新教程以便方便小白用户使用镜像