apt-get update mirrors Err:2

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root@wh-PC:/home/wh# apt-get update
Err:1 http://mirrors.aliyun.com/ubuntu xenial InRelease
Temporary failure resolving 'mirrors.aliyun.com'
Err:2 http://mirrors.aliyun.com/ubuntu xenial-security InRelease
Temporary failure resolving 'mirrors.aliyun.com'
Err:3 http://mirrors.aliyun.com/ubuntu xenial-updates InRelease
Temporary failure resolving 'mirrors.aliyun.com'
Err:4 http://mirrors.aliyun.com/ubuntu xenial-proposed InRelease
Temporary failure resolving 'mirrors.aliyun.com'
Err:5 http://mirrors.aliyun.com/ubuntu xenial-backports InRelease
Temporary failure resolving 'mirrors.aliyun.com'

Reading package lists... Done

1.vim /etc/resolv.conf

# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 127.0.1.1
nameserver 192.168.23.1
nameserver 221.130.33.52
nameserver 169.95.1.1

2. 你可以在服务器的终端中输入“lsb_release -a”命令或者查看“/etc/issue”文件来确定当前系统的版本。

eg: xenial----my version

3.vim /etc/apt/sources.list

deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial main multiverse restricted universe

deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-backports main multiverse restricted universe
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-proposed main multiverse restricted universe
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security main multiverse restricted universe
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates main multiverse restricted universe
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial main multiverse restricted universe
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-backports main multiverse restricted universe
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-proposed main multiverse restricted universe
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security main multiverse restricted universe
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates main multiverse restricted universe

4.sudo apt-get clean

sudo apt-get update

sudo apt-get upgrade

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