creating virtualenv error message

The pyramid documentation says:

1. "It is best practice to install Pyramid into a 'virtual' Python environment in order to obtain isolation from any 'system' packages you’ve got installed in your Python version"
2. to install a Virtual Python Enviroment, I have to install setuptools, it worked
3. to create a Virtual Python Enviroment, I have to run "virtualenv --no-site-packages env"
4. after saying the command, it says "If you’re on UNIX, do not use sudo to run the virtualenv script"

On 3, I ran the command, got permission denied and used sudo. I don't know if the using sudo part is going to be a problem, because I'm not sure if Linux is a kind of Unix.

Now, how to create a virtual python enviroment after seeing this message?

Traceback (most recent call last):
  File "/usr/local/bin/virtualenv", line 9, in <module>
    load_entry_point('virtualenv==1.5.1', 'console_scripts', 'virtualenv')()
  File "/usr/local/lib/python2.6/dist-packages/virtualenv-1.5.1-py2.6.egg/virtualenv.py", line 558, in main
    prompt=options.prompt)
  File "/usr/local/lib/python2开发者_如何学编程.6/dist-packages/virtualenv-1.5.1-py2.6.egg/virtualenv.py", line 647, in create_environment
    site_packages=site_packages, clear=clear))
  File "/usr/local/lib/python2.6/dist-packages/virtualenv-1.5.1-py2.6.egg/virtualenv.py", line 931, in install_python
    stdout=subprocess.PIPE)
  File "/usr/lib/python2.6/subprocess.py", line 623, in __init__
    errread, errwrite)
  File "/usr/lib/python2.6/subprocess.py", line 1141, in _execute_child
    raise child_exception
OSError: [Errno 13] Permission denied

Make sure you are in a directory that you can create files and folders in, e.g.:

cd # Go to your home directory
virtualenv --no-site-packages env # Create virtualenv

As somebody already said, you need to start the virtualenv without sudo.

This is what worked for me.

after installing setuptools and running "virtualenv --no-site-package" you didnt actually install virtualenv

so first you must install virtualenv (you must be root for this):

$ easy_install virtualenv

then just do:

$ virtualenv --no-site-package myVirtualEnv
    New python executable in myVirtualEnv/bin/python
    Installing setuptools............done.

also linux is a unix like system (to answer your question if "Linux is a kind of Unix"). here you will find out more about unix-like systems - wikipedia-Unix-like