ubuntu 执行apt-get update报错Failed to fetch

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'

这是因为镜像源除出了问题，一般都会推荐使用国内的镜像源，比如163或者阿里云或者清华大学的镜像服务器（强烈建议使用清华镜像）

清华镜像源官网：https://mirrors.tuna.tsinghua.edu.cn/help/ubuntu/

将下列文本添加到/etc/apt/sources.list文件里

# 默认注释了源码镜像以提高 apt update 速度，如有需要可自行取消注释

deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty main restricted universe multiverse

# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty main restricted universe multiverse

deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty-updates main restricted universe multiverse

# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty-updates main restricted universe multiverse

deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty-backports main restricted universe multiverse

# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty-backports main restricted universe multiverse

deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty-security main restricted universe multiverse

# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty-security main restricted universe multiverse

# 预发布软件源，不建议启用

# deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty-proposed main restricted universe multiverse

# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty-proposed main restricted universe multiverse

或者进入repogen.simplylinux.ch 选择合适的Ubuntu版本后，在ubuntu Branches下全选

拉至网页最下，点击生产，复制list下内容，添加到/etc/apt/sources.list中即可

具体参考https://jingyan.baidu.com/article/afd8f4de66efcf34e286e993.html?st=2&os=0&bd_page_type=1&net_type=2

修改镜像源之后需要重新更新：

sudo apt-get update；sudo apt-get upgrade

如果执行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

在其中添加：

 # Dynamic resolv.conf() file for glibc resolver() generated by resolvconf()

 #     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

巴特西

ubuntu 执行apt-get update报错Failed to fetch

最新文章

热门文章