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diff --git a/sites/www/installing.rst b/sites/www/installing.rst new file mode 100644 index 00000000..0d4dc1ac --- /dev/null +++ b/sites/www/installing.rst @@ -0,0 +1,105 @@ +========== +Installing +========== + +Paramiko itself +=============== + +The recommended way to get Invoke is to **install the latest stable release** +via `pip <http://pip-installer.org>`_:: + + $ pip install paramiko + +.. note:: + Users who want the bleeding edge can install the development version via + ``pip install paramiko==dev``. + +We currently support **Python 2.5/2.6/2.7**, with support for Python 3 coming +soon. Users on Python 2.4 or older are urged to upgrade. Paramiko *may* work on +Python 2.4 still, but there is no longer any support guarantee. + +Paramiko has two dependencies: the pure-Python ECDSA module `ecdsa`, and the +PyCrypto C extension. `ecdsa` is easily installable from wherever you +obtained Paramiko's package; PyCrypto may require more work. Read on for +details. + +PyCrypto +======== + +`PyCrypto <https://www.dlitz.net/software/pycrypto/>`_ provides the low-level +(C-based) encryption algorithms we need to implement the SSH protocol. There +are a couple gotchas associated with installing PyCrypto: its compatibility +with Python's package tools, and the fact that it is a C-based extension. + +.. _pycrypto-and-pip: + +Possible gotcha on older Python and/or pip versions +--------------------------------------------------- + +We strongly recommend using ``pip`` to as it is newer and generally better than +``easy_install``. However, a combination of bugs in specific (now rather old) +versions of Python, ``pip`` and PyCrypto can prevent installation of PyCrypto. +Specifically: + +* Python = 2.5.x +* PyCrypto >= 2.1 (required for most modern versions of Paramiko) +* ``pip`` < 0.8.1 + +When all three criteria are met, you may encounter ``No such file or +directory`` IOErrors when trying to ``pip install paramiko`` or ``pip install +PyCrypto``. + +The fix is to make sure at least one of the above criteria is not met, by doing +the following (in order of preference): + +* Upgrade to ``pip`` 0.8.1 or above, e.g. by running ``pip install -U pip``. +* Upgrade to Python 2.6 or above. +* Downgrade to Paramiko 1.7.6 or 1.7.7, which do not require PyCrypto >= 2.1, + and install PyCrypto 2.0.1 (the oldest version on PyPI which works with + Paramiko 1.7.6/1.7.7) + + +C extension +----------- + +Unless you are installing from a precompiled source such as a Debian apt +repository or RedHat RPM, or using :ref:`pypm <pypm>`, you will also need the +ability to build Python C-based modules from source in order to install +PyCrypto. Users on **Unix-based platforms** such as Ubuntu or Mac OS X will +need the traditional C build toolchain installed (e.g. Developer Tools / XCode +Tools on the Mac, or the ``build-essential`` package on Ubuntu or Debian Linux +-- basically, anything with ``gcc``, ``make`` and so forth) as well as the +Python development libraries, often named ``python-dev`` or similar. + +For **Windows** users we recommend using :ref:`pypm`, installing a C +development environment such as `Cygwin <http://cygwin.com>`_ or obtaining a +precompiled Win32 PyCrypto package from `voidspace's Python modules page +<http://www.voidspace.org.uk/python/modules.shtml#pycrypto>`_. + +.. note:: + Some Windows users whose Python is 64-bit have found that the PyCrypto + dependency ``winrandom`` may not install properly, leading to ImportErrors. + In this scenario, you'll probably need to compile ``winrandom`` yourself + via e.g. MS Visual Studio. See `Fabric #194 + <https://github.com/fabric/fabric/issues/194>`_ for info. + + +.. _pypm: + +ActivePython and PyPM +===================== + +Windows users who already have ActiveState's `ActivePython +<http://www.activestate.com/activepython/downloads>`_ distribution installed +may find Paramiko is best installed with `its package manager, PyPM +<http://code.activestate.com/pypm/>`_. Below is example output from an +installation of Paramiko via ``pypm``:: + + C:\> pypm install paramiko + The following packages will be installed into "%APPDATA%\Python" (2.7): + paramiko-1.7.8 pycrypto-2.4 + Get: [pypm-free.activestate.com] paramiko 1.7.8 + Get: [pypm-free.activestate.com] pycrypto 2.4 + Installing paramiko-1.7.8 + Installing pycrypto-2.4 + C:\> |