标签:ras restrict 附加 aliyun ict main 就是 extras ack
换成国内最快的阿里云源
cd /etc/apt/  
然后会显示下面的源文件sources.list 
输入命令 
sudo cp sources.list sources.list.bak 
就是将sources.list备份到sources.list.bak
阿里云源的文件
    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  
    ##测试版源  
    deb http://mirrors.aliyun.com/ubuntu/ xenial-proposed main restricted universe multiverse  
    # 源码  
    deb-src http://mirrors.aliyun.com/ubuntu/ xenial main restricted universe multiverse  
    deb-src http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted universe multiverse  
    deb-src http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted universe multiverse  
    deb-src http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse  
    ##测试版源  
    deb-src http://mirrors.aliyun.com/ubuntu/ xenial-proposed main restricted universe multiverse  
    # Canonical 合作伙伴和附加  
    deb http://archive.canonical.com/ubuntu/ xenial partner  
    deb http://extras.ubuntu.com/ubuntu/ xenial main  
替换并保存 
sudo gedit sources.list打开文件,替换成阿里云文件即可
   sudo apt-get update 更新源  
   sudo apt-get upgrade 更新软件 标签:ras restrict 附加 aliyun ict main 就是 extras ack
原文地址:https://www.cnblogs.com/nixingguo/p/9017805.html