ubuntu18.04 apt update失败问题

问题现象

Err:1 http://us.mirrors.ustc.edu.cn/ubuntu bionic InRelease
  Connection failed [IP: 202.141.176.110 80]
Err:2 http://us.mirrors.ustc.edu.cn/ubuntu bionic-updates InRelease
  Connection failed [IP: 202.141.176.110 80]
Err:3 http://us.mirrors.ustc.edu.cn/ubuntu bionic-backports InRelease
  Connection failed [IP: 202.141.176.110 80]
Hit:4 http://security.ubuntu.com/ubuntu bionic-security InRelease
Reading package lists... Done
Building dependency tree       
Reading state information... Done
186 packages can be upgraded. Run 'apt list --upgradable' to see them.
W: Failed to fetch http://us.mirrors.ustc.edu.cn/ubuntu/dists/bionic/InRelease  Connection failed [IP: 202.141.176.110 80]
W: Failed to fetch http://us.mirrors.ustc.edu.cn/ubuntu/dists/bionic-updates/InRelease  Connection failed [IP: 202.141.176.110 80]
W: Failed to fetch http://us.mirrors.ustc.edu.cn/ubuntu/dists/bionic-backports/InRelease  Connection failed [IP: 202.141.176.110 80]
W: Some index files failed to download. They have been ignored, or old ones used instead.

看了某大佬的博客,发现是ubuntu的源有问题,更换成阿里云的源,果然可以使用了

具体步骤:1.sudo vi sources.list ,(保险起见备份该文件)替换内容如下

deb http://mirrors.aliyun.com/ubuntu/ trusty main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ trusty-security main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ trusty-updates main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ trusty-proposed main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ trusty-backports main restricted universe multiverse

deb-src http://mirrors.aliyun.com/ubuntu/ trusty main restricted universe multiverse

deb-src http://mirrors.aliyun.com/ubuntu/ trusty-security main restricted universe multiverse

deb-src http://mirrors.aliyun.com/ubuntu/ trusty-updates main restricted universe multiverse

deb-src http://mirrors.aliyun.com/ubuntu/ trusty-proposed main restricted universe multiverse

deb-src http://mirrors.aliyun.com/ubuntu/ trusty-backports main restricted universe multiverse

#centos源(放心使用):

deb http://centos.bitcomm.cn/ubuntu trusty main restricted universe multiverse

deb http://centos.bitcomm.cn/ubuntu trusty-security main restricted universe multiverse

deb http://centos.bitcomm.cn/ubuntu trusty-updates main restricted universe multiverse

deb http://centos.bitcomm.cn/ubuntu trusty-backports main restricted universe multiverse

deb http://centos.bitcomm.cn/ubuntu trusty-proposed main restricted universe multiverse

deb-src http://centos.bitcomm.cn/ubuntu trusty main restricted universe multiverse

deb-src http://centos.bitcomm.cn/ubuntu trusty-security main restricted universe multiverse

deb-src http://centos.bitcomm.cn/ubuntu trusty-updates main restricted universe multiverse

deb-src http://centos.bitcomm.cn/ubuntu trusty-backports main restricted universe multiverse

deb-src http://centos.bitcomm.cn/ubuntu trusty-proposed main restricted universe multiverse
--------------------- 
作者:stopping5 
来源:优快云 
原文:https://blog.youkuaiyun.com/stopping5/article/details/80493643 
版权声明:本文为博主原创文章,转载请附上博文链接!

2.保存,退出,重新sudo apt update

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