转载于：https://www.cnblogs.com/zle1992/p/6720425.html
1.先从网站（国内的清华镜像：https://mirrors.tuna.tsinghua.edu.cn/anaconda/archive/）下载两个版本的安装包
2.安装Anaconda2：
bash Anaconda2-4.3.1-Linux-x86_64.sh
3.安装Anaconda3
bash Anaconda3-4.3.0-Linux-x86_64.sh -b -p $HOME/anaconda2/envs/py3
rm -f $HOME/anaconda2/envs/py3/bin/conda*
rm -f $HOME/anaconda2/envs/py3/conda-meta/conda-*
rm -f $HOME/anaconda2/envs/py3/bin/activate
rm -f $HOME/anaconda2/envs/py3/bin/deactivate
cd $HOME/anaconda2/envs/py3/bin
ln -s ../../../bin/conda .
ln -s ../../../bin/activate .
ln -s ../../../bin/deactivate .
4.重启一下命令行
5.conda info --envs
6.切换到anada3
source deactivate py3