Ubuntu Server 16.04 LTS First Use update source

$ sudo passwd root

Set Root password

# vi/etc/apt/sources.list

Modify the application source as follows (domestic):

#sohu Shangdong deb Http://mirrors.sohu.com/ubuntu/trusty main restricted universe multiverse Deb http:// Mirrors.sohu.com/ubuntu/trusty-security main restricted universe multiverse Deb http://mirrors.sohu.com/ubuntu/ Trusty-updates main restricted Universe Multiverse Deb http://mirrors.sohu.com/ubuntu/trusty-proposed main restricted Universe Multiverse Deb Http://mirrors.sohu.com/ubuntu/trusty-backports main restricted universe multiverse DEB-SRC Http://mirrors.sohu.com/ubuntu/trusty main restricted universe multiverse deb-src http://mirrors.sohu.com/ubuntu/ Trusty-security main restricted universe Multiverse deb-src Http://mirrors.sohu.com/ubuntu/trusty-updates main Restricted Universe Multiverse deb-src http://mirrors.sohu.com/ubuntu/trusty-proposed main restricted universe Multiverse deb-src http://mirrors.sohu.com/ubuntu/trusty-backports main restricted universe multiverse #163 Guangdong D EB http://mirrors.163.com/ubuntu/trusty Main restricted universe Multiverse Deb http://mirrors.163.com/ubuntu/trusty-security main restricted universe multiverse Deb http://mirrors.163.com/ubuntu/ Trusty-updates main restricted Universe Multiverse Deb http://mirrors.163.com/ubuntu/trusty-proposed main restricted Universe Multiverse Deb Http://mirrors.163.com/ubuntu/trusty-backports main restricted universe Multiverse deb-src http ://mirrors.163.com/ubuntu/trusty main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ Trusty-security main restricted universe Multiverse deb-src Http://mirrors.163.com/ubuntu/trusty-updates main Restricted Universe Multiverse deb-src http://mirrors.163.com/ubuntu/trusty-proposed main restricted universe Multiverse deb-src http://mirrors.163.com/ubuntu/trusty-backports main restricted universe multiverse #aliyun deb-src H
Ttp://archive.ubuntu.com/ubuntu xenial main restricted deb http://mirrors.aliyun.com/ubuntu/xenial main restricted DEB-SRC http://mirrors.aliyun.com/ubuntu/xenial main restricted multiverse UnivErse deb http://mirrors.aliyun.com/ubuntu/xenial-updates main restricted deb-src http://mirrors.aliyun.com/ubuntu/ Xenial-updates Main restricted Multiverse Universe 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 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 Deb Http://mirrors.aliyun.com/ubuntu/xenial-security Universe Deb Http://mirrors.aliyun.com/ubuntu/xenial-security Multiverse #tsinghua.edu Deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/xenial main restricted deb http:// Mirrors.tuna.tsinghua.edu.cn/ubuntu/xenial-updates main restricted Deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ Xenial Universe Deb Http://mirrors.tuna.tsinghua.edu.cn/ubuntu/xenial-updates universe Deb http:// Mirrors.tuna.tsinghua.edu.cn/ubuntu/xenial Multiverse Deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ Xenial-updates Multiverse Deb Http://mirrors.tuna.tsinghua.edu.cn/ubuntu/xenial-backports main restricted universe Multiverse Deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/xenial-security main restricted deb http:// Mirrors.tuna.tsinghua.edu.cn/ubuntu/xenial-security Universe Deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ Xenial-security multiverse #neu. edu deb-src http://mirror.neu.edu.cn/ubuntu/xenial main restricted #Added by software-p roperties deb http://mirror.neu.edu.cn/ubuntu/xenial main restricted deb-src http://mirror.neu.edu.cn/ubuntu/xenial Restricted multiverseUniverse #Added by Software-properties Deb http://mirror.neu.edu.cn/ubuntu/xenial-updates main restricted deb-src http ://mirror.neu.edu.cn/ubuntu/xenial-updates main restricted Multiverse universe Deb http://mirror.neu.edu.cn/ubuntu/ Xenial Universe Deb Http://mirror.neu.edu.cn/ubuntu/xenial-updates universe Deb http://mirror.neu.edu.cn/ubuntu/ Xenial Multiverse Deb Http://mirror.neu.edu.cn/ubuntu/xenial-updates Multiverse Deb http://mirror.neu.edu.cn/ubuntu/ Xenial-backports main restricted universe Multiverse deb-src Http://mirror.neu.edu.cn/ubuntu/xenial-backports main Restricted Universe Multiverse Deb Http://archive.canonical.com/ubuntu xenial partner deb-src http://
Archive.canonical.com/ubuntu xenial Partner Deb Http://mirror.neu.edu.cn/ubuntu/xenial-security main restricted DEB-SRC http://mirror.neu.edu.cn/ubuntu/xenial-security main restricted Multiverse universe Deb http:// Mirror.neu.edu.cn/ubuntu/xenial-security Universe Deb Http://mirror.neu.edu.cn/ubuntu/xenial-secUrity Multiverse 

# apt update && apt upgrade && apt Autoremove

Update the software source list and update the application to remove the unwanted software.