uuntu 1804のインストールが遅いので、ソースの問題を更新します。

新しいuuntuのダウンロードは遅いです。1.urtin command in targetをダウンロードできません。
2.curtin command in-targetは直接ミラーでどこでミラーを国内のソースに変えますか？
装置ソース

http://mirrors.163.com/ubuntu/

ソフトウェアソース

cp /etc/apt/sources.list /etc/apt/sources.list.back
rm sources.list
vim sources.list

萼アリ源に書き込む

deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse

apt-get update
apt-get upgrade
reboot