centos 7 安裝python3.7 和scapy

安裝必要的庫，針對centos 是minimal 安裝
yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc make libffi-devel epel-release vim -y
wget https://www.python.org/ftp/python/3.7.0/Python-3.7.0.tgz
tar -zxvf Python-3.7.0.tgz
cd Python-3.7.0
./configure prefix=/usr/local/python3
make && make install

安裝一些常用的python 庫
pip install --pre scapy[basic]
pip install python-cryptography
pip install pyx
pip install cryptography
pip install vpython
pip install matplotlib

軟鏈接
ln -s /usr/local/python3/bin/python3.7 /usr/bin/python
ln -s /usr/local/python3/bin/pip3.7 /usr/bin/pip
ln -s /usr/local/python3/bin/scapy /usr/bin/scapy

運行vim 時遇到問題解決的辦法(vim 有些代碼是使用python2）：
vi /usr/bin/yum
把 #! /usr/bin/python 修改爲 #! /usr/bin/python2
vi /usr/libexec/urlgrabber-ext-down
把 #! /usr/bin/python 修改爲 #! /usr/bin/python2