Primero, la dirección de origen
1. Aliyuan:
deb http://mirrors.aliyun.com/ubuntu/ bionic universo restringido principal multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-security universo restringido principal multiverse
deb http://mirrors.aliyun.com/ubuntu / bionic-updates main universo restringido multiverse
deb http://mirrors.aliyun.com/ubuntu/ propuesta bionic main universo restringido multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main universo restringido multiverse
deb- src http://mirrors.aliyun.com/ubuntu/ bionic universo restringido principal multiverso
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security universo restringido principal multiverso
deb-src http: //mirrors.aliyun .com / ubuntu / bionic-updates principal multiverse universo restringido
deb-src http://mirrors.aliyun.com/ubuntu/ multion universo restringido principal propuesto por bionic
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports multiverso universo restringido principal
2. Zhongyuan Dayuan:
deb https://mirrors.ustc.edu.cn/ubuntu/ bionic main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-updates main universo restringido multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-updates main universo restringido multiverse
deb https: / /mirrors.ustc.edu.cn/ubuntu/ bionic-backports principal universo restringido multiverso
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-backports principal universo restringido multiverso
deb https: //mirrors.ustc .edu.cn / ubuntu / bionic-security principal restringido universo multiverso
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-security principal restringido universo multiverso
deb https://mirrors.ustc.edu.cn / ubuntu / bionic-propuesto universo restringido multiverso universo
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-propuesto universo restringido multiverso universo
3. Fuente 163:
deb http://mirrors.163.com/ubuntu/ bionic principal restringido universo multiverso
deb http://mirrors.163.com/ubuntu/ bionic-security principal restringido universo multiverso
deb http://mirrors.163.com/ubuntu / bionic-updates principal universo restringido multiverse
deb http://mirrors.163.com/ubuntu/ bionic-propuesto principal universo restringido multiverse
deb http://mirrors.163.com/ubuntu/ bionic-backports principal universo restringido multiverse
deb- src http://mirrors.163.com/ubuntu/ bionic universo restringido principal multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic-security universo restringido principal multiverse
deb-src http: //mirrors.163 .com / ubuntu / bionic-updates principal multiverse universo restringido
deb-src http://mirrors.163.com/ubuntu/ multion universo restringido principal propuesto por bionic
deb-src http://mirrors.163.com/ubuntu/ bionic-backports multiverso universo restringido principal
4. Fuente de Tsinghua:
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic principal restringido universo multiverso
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic principal restringido universo multiverso
deb https: / /mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates main universo restringido multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates main universo restringido multiverse
deb https: / /mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports principal restringido universo multiverso
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports principal restringido universo multiverso
deb https: / /mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security principal universo restringido multiverso
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ multion universo restringido principal bionic-security
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ multiverso universo restringido principal propuesto por bionic
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ multion universo restringido principal propuesto por bionic
Segundo, la fuente de actualización
1. Fuente antes de la copia de seguridad
cp /etc/apt/sources.list /etc/apt/sources.list.bak
Escriba una de las fuentes anteriores en el archivo /etc/apt/sources.list
apt-get update update fuente local apt