first list is now complete

packages.txt

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+
+
+The following commands should be working for you at the unix shell, if not
+see if you can install them with your favorite package tool.
+This file is also part of our pitp2016 git repo (see below on how to update
+this) as "packages.txt"
+
+
+
+git --version
+
+	we also use this to distribute notes, scripts, software for PITP 2016.
+	To get a copy:
+
+	   git clone http://github.com/teuben/pitp2016
+	   cd pitp2016
+
+	and to get a fresh version with the latest updates:
+
+	   cd pitp2016
+	   git pull
+
+
+gcc	   
+g++
+gfortran
+
+	The C/C++/Fortran(90) compiler suite.  Others may be available as well that work
+	also, e.g. "clang", the Intel compiler and the PGI compiler.
+	The C compiler needs to suport OpenMP (which gcc does)
+
+
+
+python
+ipython
+
+	Although the python command may be present for you, what we really want here is
+	an integrated scientific python environment, e.g. via anaconda.
+	Within python, the following modules are recommended:
+
+	numpy
+	scipy
+	matplotlib
+	yt
+	astropy
+
+
+ffmpeg -version
+       This tool creates movies from still images that simulations often create on the fly.
+       Great for presentations. We will use this for a few of the homeworks.
+
+       In ubuntu linux:
+           sudo apt install ffmpeg imagemagick vlc
+
+gsl
+	This is the Gnu Scientific Library. Use your package manager to install it, e.g.
+	In Ubuntu linux:
+            sudo apt install libgsl-dev
+
+
+
+gnuplot
+	A simple, basic but effective way to plot data.
+
+ygraph
+	Another simple and basic graph plotter. 
+	See for example http://cactuscode.org/documentation/visualization/yGraph/
+
+
+yt
+	Versatile visualization environment in python. Probably easiest to install within
+	your python environment via the commands
+		conda install yt
+        or
+		pip install yt
+	depending which type of python environment you have
+
+
+visit
+        A more graphical based visualization environment
+	See
+	    https://wci.llnl.gov/simulation/computer-codes/visit/