首先查看版本
lsb_release -c
Codename: eoan
即為eoan版本
下面是163的源
deb http://mirrors.163.com/ubuntu/ eoan main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ eoan-security main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ eoan-updates main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ eoan-proposed main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ eoan-backports main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ eoan main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ eoan-security main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ eoan-updates main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ eoan-proposed main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ eoan-backports main restricted universe multiverse
當然如果第一步獲取的版本不是eoan 就把上面的eoan替換成你自己的版本
然后把/etc/apt/sources.list刪除 把上面的內容寫進去
保存后執行
sudo apt-get update