ubuntu1804安装慢，更新源问题

新装ubuntu 下载源慢，无法下载
直接看最后。。

卡在 curtin command apt-config或者cuttin command in-target等问题基本都是源太慢

下载ssh服务

ssh上wp新账户，su到root
root账户登录限制，需要改ssh.conf配置，这里通过小技巧跳过

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

写入
#阿里源

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

还是不行，后来发现，直接在镜像哪里把镜像换成

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

就行了。。。