cent-install-instructions_python.md

Preface

This guide is one section of a larger guide to installing a cent 6.x server in virtual box for development purposes with different applications. The top level guide with links to all of the sections is here: https://gist.github.com/ryanguill/5149058 Some instructions in this guide may assume a configuration from other parts of the guide.

#Install Python 2.7.x

Following instructions from: http://toomuchdata.com/2012/06/25/how-to-install-python-2-7-3-on-centos-6-2/

# su -

Install Development Tools (this should have been installed already if you followed the steps from above, but we need to make sure)

# yum groupinstall "Development tools"

Install some other requirements (also most likely installed, but need to be sure)

# yum install zlib-devel
# yum install bzip2-devel
# yum install openssl-devel
# yum install ncurses-devel

Find the latest version of the 2.7 python branch: http://www.python.org/download/

You are looking for the Python 2.7.3 bzipped source tarball, http://www.python.org/ftp/python/2.7.3/Python-2.7.3.tar.bz2 at the time of writing this

Make sure you are in your home directory

# cd ~
# pwd

should return /root

Note: still trying to figure out if /usr/local is the best place to put this, but it works well for now

Note: the altinstall vs install is VERY IMPORTANT - if you use install YOU WILL BREAK THE OS IN LIKELY UNRECOVERABLE WAYS

Note: these steps may take a few minutes, especially configure and the install, be patient

# wget http://www.python.org/ftp/python/2.7.3/Python-2.7.3.tar.bz2
# tar xf Python-2.7.3.tar.bz2
# cd Python-2.7.3
# ./configure --prefix=/usr/local
# make && make altinstall

Start the python 2.7 REPL to verify installation

# python2.7

you should get a REPL that looks something like this:

[root@cent6-tmpl Python-2.7.3]    # python2.7
Python 2.7.3 (default, Feb 11 2013, 10:02:30)
[GCC 4.4.6 20120305 (Red Hat 4.4.6-4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>>

use exit() to get out of the REPL

The system version of python (that is required for the os to function) should be available as /usr/bin/python and /usr/bin/python2.6

Set up distribute

Note: you must use python2.7 for the fourth line!

# wget http://pypi.python.org/packages/source/d/distribute/distribute-0.6.27.tar.gz
# tar xf distribute-0.6.27.tar.gz
# cd distribute-0.6.27
# python2.7 setup.py install

validate that it installed properly

# cd /usr/local/bin
# ls -la

you should see an easy_install and an easy_install-2.7

Install virtualenv

Go back to your home directory

# cd ~

# easy_install-2.7 virtualenv

test it out:

# virtualenv test
# cd test
# source bin/activate

you should get a prompt that looks like (test)[root@cent6-tmpl test]#

# deactivate

Clean up after yourself

# cd ~
# rm Python-2.7.3.tar.bz2
# rm -rf Python-2.7.3
# rm -rf test

Done installing python 2.7

ryanguill/cent-install-instructions_python.md

Preface