版本代号说明
18.04 lts -- bionic
16.04 lts -- xenial
14.04 lts -- trusty
官方源
deb http://cn.archive.ubuntu.com/ubuntu/ bionic main restricted universe multiverse
deb http://cn.archive.ubuntu.com/ubuntu/ bionic-security main restricted universe multiverse
deb http://cn.archive.ubuntu.com/ubuntu/ bionic-updates main restricted universe multiverse
deb http://cn.archive.ubuntu.com/ubuntu/ bionic-backports main restricted universe multiverse
注：如要用于其他版本，切换版本代号即可。
国内源
- 清华大学
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
- 阿里云
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-backports main restricted universe multiverse
设置不更新某个软件
$ echo docker-engine hold | sudo dpkg --set-selections
或：
$ sudo apt-mark hold docker-engine
设置更新某个软件
$ echo docker-engine install | sudo dpkg --set-selections
或：
$ sudo apt-mark unhold docker-engine