Ubuntu常见问题1： Temporary failure resolving ‘us.archive.ubuntu.com‘

1.问题描述

连接不上Err:1 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 liblua5.2-0 amd64 5.2.4-1ubuntu1  等Ubuntu相关库的官网，报错日志如下：

root@scott:/home/scott# apt install yum
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
  debugedit libarchive13 liblua5.2-0 libnspr4 libnss3 libnss3-nssdb librpm3 librpmbuild3 librpmio3 librpmsign3 libsqlite0 python-libxml2
  python-lzma python-pycurl python-rpm python-sqlite python-sqlitecachec python-urlgrabber rpm rpm-common rpm2cpio
Suggested packages:
  rpm-i18n lrzip libcurl4-gnutls-dev python-pycurl-dbg python-pycurl-doc python-sqlite-dbg alien elfutils rpmlint rpm2html
The following NEW packages will be installed:
  debugedit libarchive13 liblua5.2-0 libnspr4 libnss3 libnss3-nssdb librpm3 librpmbuild3 librpmio3 librpmsign3 libsqlite0 python-libxml2
  python-lzma python-pycurl python-rpm python-sqlite python-sqlitecachec python-urlgrabber rpm rpm-common rpm2cpio yum
0 upgraded, 22 newly installed, 0 to remove and 2 not upgraded.
Need to get 3,091 kB/3,134 kB of archives.
After this operation, 12.9 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Err:1 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 liblua5.2-0 amd64 5.2.4-1ubuntu1
  Temporary failure resolving 'us.archive.ubuntu.com'
Err:2 http://security.ubuntu.com/ubuntu xenial-security/main amd64 libnspr4 amd64 2:4.13.1-0ubuntu0.16.04.1
  Temporary failure resolving 'us.archive.ubuntu.com'
Ign:3 http://us.archive.ubuntu.com/ubuntu xenial-updates/main i386 libnss3-nssdb all 2:3.28.4-0ubuntu0.16.04.14
Err:2 http://security.ubuntu.com/ubuntu xenial-security/main amd64 libnspr4 amd64 2:4.13.1-0ubuntu0.16.04.1
  Temporary failure resolving 'us.archive.ubuntu.com'
2% [Connecting to us.archive.ubuntu.com]

2.原因分析

dns没有配置，不能解析域名。

3.解决办法

修改resolv.conf文件，添加：

vi /etc/resolv.conf

nameserver 8.8.8.8
nameserver 8.8.4.4
nameserver 114.114.115.115
nameserver 114.114.114.114

重启网络，就可以使生效了。

/etc/init.d/networking restart

重启Linux后，上面的修改可能生效，要想永久有用，

修改base文件，添加：

vi /etc/resolvconf/resolv.conf.d/base

nameserver 8.8.8.8
nameserver 8.8.4.4
nameserver 114.114.115.115
nameserver 114.114.114.114

重启Linux，使生效。