wget https://www.python.org/ftp/python/3.5.0/Python-3.5.0.tgz tar xvf Python-3.5.0.tgz rm Python-3.5.0.tgz cd Python-3.5.0 ./configure --prefix=/opt/python3 make install ln -s /opt/python3/bin/python3.5 /usr/bin/python3 ln -s /opt/python3/bin/pip3.5 /usr/bin/pip3 ln -s /opt/python3/bin/easy_install-3.5 /usr/bin/easy_install3
如果安装python3时出现
Ignoring ensurepip failure:pip required SSL/TLS
因为没有安装OpenSSL，yum安装openssl-devel
yum install openssl-devel
重新编译：
make clean;make install
安装scapy
pip3 install scapy-python3 yum install libffi-devel pip3 install cryptography ln -s /opt/python/bin/scapy /usr/bin/scapy
安装完成后运行scapy:
[root@localhost ~]# scapy INFO: Can't load Python libreadline or completer WARNING: No route found for IPv6 destination :: (no default route?). This affects only IPv6 INFO: Please, report issues to https://github.com/phaethon/scapy WARNING: IPython not available. Using standard Python shell instead. Welcome to Scapy (3.0.0) >>>
解决Can't load Python libreadline or completer的问题：
yum install readline-devel yum install patch pip3 install readline
再次运行scapy,这时已经支持自动补全了:
[root@vnode33 ~]# scapy WARNING: No route found for IPv6 destination :: (no default route?). This affects only IPv6 INFO: Please, report issues to https://github.com/phaethon/scapy WARNING: IPython not available. Using standard Python shell instead. Welcome to Scapy (3.0.0) >>>
Session saving/loading functions require dill library:
pip3 install dill