stillwaters (master *) ud120-projects $ pip install --upgrade pip
You are using pip version 6.0.7, however version 6.1.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
Collecting pip from https://pypi.python.org/packages/py2.py3/p/pip/pip-6.1.1-py2.py3-none-any.whl#md5=172eb5abab25a5e0f7a7b63c7a49378d
  Using cached pip-6.1.1-py2.py3-none-any.whl
Installing collected packages: pip
  Found existing installation: pip 6.0.7
    Uninstalling pip-6.0.7:
      Exception:
      Traceback (most recent call last):
        File "/usr/local/lib/python2.7/dist-packages/pip/basecommand.py", line 232, in main
          status = self.run(options, args)
        File "/usr/local/lib/python2.7/dist-packages/pip/commands/install.py", line 347, in run
          root=options.root_path,
        File "/usr/local/lib/python2.7/dist-packages/pip/req/req_set.py", line 543, in install
          requirement.uninstall(auto_confirm=True)
        File "/usr/local/lib/python2.7/dist-packages/pip/req/req_install.py", line 653, in uninstall
          paths_to_remove.remove(auto_confirm)
        File "/usr/local/lib/python2.7/dist-packages/pip/req/req_uninstall.py", line 126, in remove
          renames(path, new_path)
        File "/usr/local/lib/python2.7/dist-packages/pip/utils/__init__.py", line 313, in renames
          shutil.move(old, new)
        File "/usr/lib/python2.7/shutil.py", line 303, in move
          os.unlink(src)
      OSError: [Errno 13] Permission denied: '/usr/local/bin/pip'