Ubuntu 16.04 源添加

• 今天新装了一个 Ubuntu16.04， apt-get 报错

  Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable)
  E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?
  

• 想了一下，应该是 sources.list 未修改的原因，就把这个替换成清华的大学的源

  # /etc/apt/sources.list
  deb cdrom:[Ubuntu 16.04 LTS _Xenial Xerus_ - Release amd64 (20160420.1)]/ xenial main restricted
  deb-src http://archive.ubuntu.com/ubuntu xenial main restricted #Added by software-properties
  deb http://mirrors.aliyun.com/ubuntu/ xenial main restricted
  deb-src http://mirrors.aliyun.com/ubuntu/ xenial main restricted multiverse universe #Added by software-properties
  deb http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted
  deb-src http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted multiverse universe #Added by software-properties
  deb http://mirrors.aliyun.com/ubuntu/ xenial universe
  deb http://mirrors.aliyun.com/ubuntu/ xenial-updates universe
  deb http://mirrors.aliyun.com/ubuntu/ xenial multiverse
  deb http://mirrors.aliyun.com/ubuntu/ xenial-updates multiverse
  deb http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse
  deb-src http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse #Added by software-properties
  deb http://archive.canonical.com/ubuntu xenial partner
  deb-src http://archive.canonical.com/ubuntu xenial partner
  deb http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted
  deb-src http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted multiverse universe #Added by software-properties
  deb http://mirrors.aliyun.com/ubuntu/ xenial-security universe
  deb http://mirrors.aliyun.com/ubuntu/ xenial-security multiverse
  

• 更新一下

  sudo apt-get update