+# How to install NEPI
+
+## Quick install
+
+The recommended way is to pull NEPI from the [python package index archive](pypi.python.org) using `pip`.
+
+ sudo pip install nepi
+
+Most likely this is all you need to do to run simple scripts from the tutorials.
+
+Alternatively, you may specify a specific version number, e.g.:
+
+ sudo pip install nepi==6.0.4
+
+
+## Getting `pip`
+
+If you receive `command not found` when invoking `pip`, you will need to install this utility. Depending on your linux distribution, you can use
+
+* Fedora / RedHat / CentOS
+
+ `sudo yum install python-pip`
+
+* Debian - ubuntu
+
+ `sudo apt-get install python-pip`
+
+## python2 *vs* python3
+
+If you want to use python3, depending on how your system is configured, you might need to invoke
+
+ sudo pip3 install nepi
+
+and to `yum` or `apt-get` the `python3-pip` package instead.
+
+## More dependencies
+
+The following optional packages can be useful in some setups, but are not automatically pulled by `pip` because of their size and/or because they require additional binary tools in turn:
+
+* `sudo pip install matplotlib`
+* `sudo pip install pygraphviz`
+
+Of course, here again you might wish to use `pip3` instead.
+
+# Installing from sources
+
+Alternatives approaches, more suitable to developers, are as follows:
+
+* In order to install for all users:
+
+#
+ git clone git://git.onelab.eu/nepi.git
+ cd nepi
+ sudo make install
+
+* And in order to use NEPI without installing:
+
+#
+ git clone git://git.onelab.eu/nepi.git
+ cd nepi
+ export PYTHONPATH=$(pwd)
+ cd somewhere_else
+ python3 your-script.nepi
+
+
+# Older sheet
+You can also see the [original installation sheet for NEPI 3](http://nepi.inria.fr/Install/WebHome)
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