PyMeep conda packages are currently only available for python 2.7 and 3.6 on Linux (tested on Debian Jessie and Ubuntu Xenial). Note that PyMeep is still in its development stages, and should be considered alpha software. The conda packages are subject to change at any time.
1. Install Miniconda
It doesn't really matter if you install the python 2.7 or 3.6 version, since you can create conda environments with any version you want.
wget https://repo.continuum.io/miniconda/Miniconda3-latest-Linux-x86_64.sh
bash Miniconda3-latest-Linux-x86_64.sh -b -p <desired_prefix>/miniconda3
export PATH=<desired_prefix>/miniconda3/bin:$PATH