https://developer.aliyun.com/mirror/ubuntu?spm=a2c6h.13651102.0.0.6d281b11u4Ldo9

备份：

sudo mv /etc/apt/sources.list /etc/apt/sources.listbak

ubuntu 18.04(bionic) 配置如下：

sudo sh -c 'echo "deb https://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse\ndeb-src https://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse\ndeb https://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse\ndeb-src https://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse\ndeb https://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse\ndeb-src https://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse\n# deb https://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse\n# deb-src https://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse\ndeb https://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse\ndeb-src https://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse" > /etc/apt/sources.list'

 sudo apt-get update && sudo apt-get upgrade