想在自己VM上安装numpy，然后尼码出来一些乱七八糟的问题。活该我用ubuntu还不太熟。
1.首先直接sudo apt-get install python-numy。然后出错：错误 http://cn.archive.ubuntu.com/ubuntu/ trusty-updates/main libgfortran3 i386 4.8.4-2ubuntu1~14.04
404 Not Found [IP: 112.124.140.210 80]
然后尝试用它的提示“apt-get update 或者加上 --fix-missing”来修复。没有作用。
之后提示：
“libblas3gf : 依赖: libblas3 但是它将不会被安装
libgfortran3 : 依赖: gcc-4.8-base (= 4.8.2-19ubuntu1) 但是 4.8.4-2ubuntu1~14.04 正要被安装
E: 有未能满足的依赖关系。请尝试不指明软件包的名字来运行“apt-get -f install”(也可以指定一个解决办法)。”
用 sudo apt-get install libblas3 libblas3gf可以修复第一个依赖，第二个仍然不行。
2,解决尝试换源：
开始换了163的源，出现“W: 无法下载 bzip2:/var/lib/apt/lists/partial/mirrors.163.com_ubuntu_dists_trusty-security_main_i18n_Translation-en Hash 校验和不符
W: 无法下载 bzip2:/var/lib/apt/lists/partial/mirrors.163.com_ubuntu_dists_trusty-security_universe_i18n_Translation-en Hash 校验和不符
W: 无法下载 bzip2:/var/lib/apt/lists/partial/mirrors.163.com_ubuntu_dists_trusty-updates_main_source_Sources Hash 校验和不符
”的错误，这种情况最好换源。
换源：
su -登录root用户。
cd /etc/apt
cp sources.list sources.list.old
打开sources.list，删除原来所有内容，把清华大学的源拷进去。
如下：清华大学更新服务器，（教育网核心节点百兆接入，已计划提高到千兆）由清华大学学生网管会维护。包含其他开源镜像：
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty main restricted universe multiverse
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty-security main restricted universe multiverse
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty-updates main restricted universe multiverse
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty-backports main restricted universe multiverse
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty-proposed main restricted universe multiverse
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty main restricted universe multiverse
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty-security main restricted universe multiverse
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty-updates main restricted universe multiverse
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty-proposed main restricted universe multiverse
IPv4-Only 地址
deb http://mirrors.4.tuna.tsinghua.edu.cn/ubuntu/ trusty main restricted universe multiverse
deb http://mirrors.4.tuna.tsinghua.edu.cn/ubuntu/ trusty-security main restricted universe multiverse
deb http://mirrors.4.tuna.tsinghua.edu.cn/ubuntu/ trusty-updates main restricted universe multiverse
deb http://mirrors.4.tuna.tsinghua.edu.cn/ubuntu/ trusty-backports main restricted universe multiverse
deb http://mirrors.4.tuna.tsinghua.edu.cn/ubuntu/ trusty-proposed main restricted universe multiverse
deb-src http://mirrors.4.tuna.tsinghua.edu.cn/ubuntu/ trusty main restricted universe multiverse
deb-src http://mirrors.4.tuna.tsinghua.edu.cn/ubuntu/ trusty-security main restricted universe multiverse
deb-src http://mirrors.4.tuna.tsinghua.edu.cn/ubuntu/ trusty-updates main restricted universe multiverse
deb-src http://mirrors.4.tuna.tsinghua.edu.cn/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://mirrors.4.tuna.tsinghua.edu.cn/ubuntu/ trusty-proposed main restricted universe multiverse
IPv6-Only 地址
deb http://mirrors.6.tuna.tsinghua.edu.cn/ubuntu/ trusty main multiverse restricted universe
deb http://mirrors.6.tuna.tsinghua.edu.cn/ubuntu/ trusty-backports main multiverse restricted universe
deb http://mirrors.6.tuna.tsinghua.edu.cn/ubuntu/ trusty-proposed main multiverse restricted universe
deb http://mirrors.6.tuna.tsinghua.edu.cn//ubuntu/ trusty-security main multiverse restricted universe
deb http://mirrors.6.tuna.tsinghua.edu.cn/ubuntu/ trusty-updates main multiverse restricted universe
deb-src http://mirrors.6.tuna.tsinghua.edu.cn/ubuntu/ trusty main multiverse restricted universe
deb-src http://mirrors.6.tuna.tsinghua.edu.cn/ubuntu/ trusty-backports main multiverse restricted universe
deb-src http://mirrors.6.tuna.tsinghua.edu.cn/ubuntu/ trusty-proposed main multiverse restricted universe
deb-src http://mirrors.6.tuna.tsinghua.edu.cn/ubuntu/ trusty-security main multiverse restricted universe
deb-src http://mirrors.6.tuna.tsinghua.edu.cn/ubuntu/ trusty-updates main multiverse restricted universe
运行指令apt-get update
3.之后su XX(你的用户名)
sudo apt-get install gcc-4.8-base libgfortran3仍然不能解决依赖
根据提示执行“sudo apt-get -f install”就可以了
之后再“sudo apt-get install python-numpy”。好了，python一下就可以import numpy as np。
numpy的效率很高，是用c++写的。python里可以添加c++代码，大家都知道的吧，所以中间才有依赖g++的情况（我是这样想得）。
好了，我要好好把ubuntu搞懂了。