Ubuntu 23.10 换源

查看当前Ubuntu系统的版本

使用命令：

lsb_release -a

中科大源：

deb https://mirrors.ustc.edu.cn/ubuntu-old-releases/ubuntu/ mantic main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu-old-releases/ubuntu/ mantic main restricted universe multiverse

deb https://mirrors.ustc.edu.cn/ubuntu-old-releases/ubuntu/ mantic-security main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu-old-releases/ubuntu/ mantic-security main restricted universe multiverse

deb https://mirrors.ustc.edu.cn/ubuntu-old-releases/ubuntu/ mantic-updates main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu-old-releases/ubuntu/ mantic-updates main restricted universe multiverse

deb https://mirrors.ustc.edu.cn/ubuntu-old-releases/ubuntu/ mantic-backports main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu-old-releases/ubuntu/ mantic-backports main restricted universe multiverse

更新：

sudo  apt update
sudo  apt upgrade