阿里云 Ubuntu 24.04 为例
可以先查看/etc/apt/sources.list.d/ubuntu.sources文件中字符看是否替换文字正确

cat /etc/apt/sources.list.d/ubuntu.sources

sudo sed -i 's|http://archive.ubuntu.com/|http://mirrors.aliyun.com/|g' /etc/apt/sources.list.d/ubuntu.sources