title: How can I remove a URL channel from Anaconda?
body: <p>Recently I needed to install PyPdf2 to one of my programs using Anaconda. Unfortunately, I failed, but the URLs that was added to Anaconda environment prohibit the updates of all the Conda libraries.
  Every time I tried to update anaconda it gives the following </p>
  
  <pre><code>conda update conda
  Using Anaconda Cloud api site https://api.anaconda.org
  Fetching package metadata ..........Error: Invalid index file: https://pypi.python.org/pypi/PyPDF2/1.26.0/win-64/repodata.json: No JSON object could be decoded
  </code></pre>
  
  <p>I typed the command <strong>conda info</strong> to see what causes the error, I found lots of URLs that points to PyPdf2!</p>
  
  <p>Simply, I want to remove all these URLS from anaconda's channel URLs, How can I do it? No matter manually or automatic.</p>
  
  <p>Note: I have uninstalled Anaconda, and reinstall, but no luck!</p>
  
  <pre><code>C:\WINDOWS\system32&gt;conda info
  Using Anaconda Cloud api site https://api.anaconda.org
  Current conda install:
  
               platform : win-64
          conda version : 4.1.6
      conda-env version : 2.5.1
    conda-build version : 1.21.3
         python version : 2.7.12.final.0
       requests version : 2.10.0
       root environment : C:\Anaconda2  (writable)
    default environment : C:\Anaconda2
       envs directories : C:\Anaconda2\envs
          package cache : C:\Anaconda2\pkgs
           channel URLs : https://pypi.python.org/pypi/PyPDF2/1.26.0/win-64/
                          https://pypi.python.org/pypi/PyPDF2/1.26.0/noarch/
                          https://conda.anaconda.org/C:\Python27\Lib\site-packages\PyPDF2/win-64/
                          https://conda.anaconda.org/C:\Python27\Lib\site-packages\PyPDF2/noarch/
                          https://conda.anaconda.org/X:\Downloads\Compressed\PyPDF2-master\/win-64/
                          https://conda.anaconda.org/X:\Downloads\Compressed\PyPDF2-master\/noarch/
                          https://github.com/mstamy2/PyPDF2/zipball/master/win-64/
                          https://github.com/mstamy2/PyPDF2/zipball/master/noarch/
                          https://pypi.python.org/pypi/PyPDF2/win-64/
                          https://pypi.python.org/pypi/PyPDF2/noarch/
                          https://pythonhosted.org/PyPDF2/win-64/
                          https://pythonhosted.org/PyPDF2/noarch/
                          https://github.com/mstamy2/PyPDF2/win-64/
                          https://github.com/mstamy2/PyPDF2/noarch/
                          https://repo.continuum.io/pkgs/free/win-64/
                          https://repo.continuum.io/pkgs/free/noarch/
                          https://repo.continuum.io/pkgs/pro/win-64/
                          https://repo.continuum.io/pkgs/pro/noarch/
            config file : C:\Users\Dr. Mohammad Elnesr\.condarc
           offline mode : False
      is foreign system : False
  </code></pre>