官方源太慢了,我更新成阿里云的了,步骤如下
1、cp /etc/apt/sources.list /etc/apt/sources.list.old #备份原来的源文件
2、vim /etc/apt/sources.list
#清空原有信息复制粘贴新源,简单粗暴
deb http://mirrors.aliyun.com/ubuntu/ xenial main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse
:wq
3、sudo apt-get update
注:之前有见过博客说更换新源后 update失败,当然,是所有步骤正确的前提下。那位兄弟的Ubuntu环境是建立在vmware虚拟机上的,虚拟机的网络转发方式是NAT,后来他把NAT改为Bridge.成功率很高。仅供参考