[转载] Linux pip? 改源

https://www.jianshu.com/p/f4d7e134ea7a

https://www.cnblogs.com/shuai7boy/p/11389136.html

1.首先备份原来的源

sudo cp /etc/apt/sources.list /etc/apt/sources.list.backup

2.编辑/etc/apt/sources.list文件，将源更换为阿里云的源:

sudo gedit /etc/apt/sources.list

3.在打开的文件前面添加源

#阿里云源
deb http://mirrors.aliyun.com/ubuntu/ disco main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ disco main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ disco-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ disco-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ disco-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ disco-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ disco-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ disco-backports main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ disco-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ disco-proposed main restricted universe multiverse

#中科大源
deb https://mirrors.ustc.edu.cn/ubuntu/ disco main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ disco main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ disco-updates main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ disco-updates main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ disco-backports main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ disco-backports main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ disco-security main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ disco-security main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ disco-proposed main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ disco-proposed main restricted universe multiverse

#163源
deb http://mirrors.163.com/ubuntu/ disco main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ disco-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ disco-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ disco-proposed main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ disco-backports main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ disco main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ disco-security main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ disco-updates main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ disco-proposed main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ disco-backports main restricted universe multiverse

#清华源
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ disco main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ disco main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ disco-updates main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ disco-updates main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ disco-backports main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ disco-backports main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ disco-security main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ disco-security main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ disco-proposed main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ disco-proposed main restricted universe multiverse

4.让更新源生效

sudo apt-get update

作者：颜水花生
链接：https://www.jianshu.com/p/f4d7e134ea7a
来源：简书
著作权归作者所有。商业转载请联系作者获得授权，非商业转载请注明出处。

# 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(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