ubuntu 执行apt-get update报错Failed to fetch

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在ubuntu下执行sudo apt-get update时,经常会遇到报错:

Err http://security.ubuntu.com precise-security InRelease

Err http://security.ubuntu.com precise-security Release.gpg
  Temporary failure resolving 'security.ubuntu.com'
Err http://cn.archive.ubuntu.com precise InRelease

Err http://cn.archive.ubuntu.com precise-updates InRelease

Err http://cn.archive.ubuntu.com precise-backports InRelease

Err http://cn.archive.ubuntu.com precise Release.gpg
  Temporary failure resolving 'cn.archive.ubuntu.com'
Err http://cn.archive.ubuntu.com precise-updates Release.gpg
  Temporary failure resolving 'cn.archive.ubuntu.com'
Err http://cn.archive.ubuntu.com precise-backports Release.gpg
  Temporary failure resolving 'cn.archive.ubuntu.com'
Reading package lists... Done
W: Failed to fetch http://cn.archive.ubuntu.com/ubuntu/dists/precise/InRelease  

W: Failed to fetch http://cn.archive.ubuntu.com/ubuntu/dists/precise-updates/InRelease  

W: Failed to fetch http://cn.archive.ubuntu.com/ubuntu/dists/precise-backports/InRelease  

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/precise-security/InRelease  

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/precise-security/Release.gpg  Temporary failure resolving 'security.ubuntu.com'

W: Failed to fetch http://cn.archive.ubuntu.com/ubuntu/dists/precise/Release.gpg  Temporary failure resolving 'cn.archive.ubuntu.com'

W: Failed to fetch http://cn.archive.ubuntu.com/ubuntu/dists/precise-updates/Release.gpg  Temporary failure resolving 'cn.archive.ubuntu.com'

W: Failed to fetch http://cn.archive.ubuntu.com/ubuntu/dists/precise-backports/Release.gpg  Temporary failure resolving 'cn.archive.ubuntu.com'

W: Some index files Failed to download. They have been ignored,or old ones used instead.

一般都会推荐使用国内的镜像源,比如163或者阿里云的镜像服务器
将下列文本添加到/etc/apt/sources.list文件

deb http://mirrors.aliyun.com/ubuntu/ raring main restricted universe multiverse  
deb http://mirrors.aliyun.com/ubuntu/ raring-security main restricted universe multiverse  
deb http://mirrors.aliyun.com/ubuntu/ raring-updates main restricted universe multiverse  
deb http://mirrors.aliyun.com/ubuntu/ raring-proposed main restricted universe multiverse  
deb http://mirrors.aliyun.com/ubuntu/ raring-backports main restricted universe multiverse  
deb-src http://mirrors.aliyun.com/ubuntu/ raring main restricted universe multiverse  
deb-src http://mirrors.aliyun.com/ubuntu/ raring-security main restricted universe multiverse  
deb-src http://mirrors.aliyun.com/ubuntu/ raring-updates main restricted universe multiverse  
deb-src http://mirrors.aliyun.com/ubuntu/ raring-proposed main restricted universe multiverse  
deb-src http://mirrors.aliyun.com/ubuntu/ raring-backports main restricted universe multiverse

但是执行sudo apt-get update仍然报错,问题在于DNS没有配置好。
解决方法

sudo vi /etc/resolv.conf

添加

# 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
#这里用的是阿里云的DNS服务器
nameserver 223.5.5.5  
nameserver 223.6.6.6

后执行sudo apt-get update就正常了。

参考:
ubuntu apt-get update 失败解决。
Ubuntu操作系统“Failed to fetch”错误的解决方法
docker ubuntu容器更换阿里源

原文链接:https://www.f2er.com/ubuntu/354249.html

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