Python 使用sudo命令安装pip包

我正在尝试安装virtualenv软件包-

首先，我直接尝试安装，但获得了拒绝权限错误 其次，使用sudo命令的同一用户（具有sudo访问权限）告诉pip2.7不是命令

为什么pip2.7对用户可见，但不使用sudo命令

[lduser@q-dev-5461-4f3c-9d98-7af28dfc3ec6 bin]$ pip2.7 install virtualenv
Collecting virtualenv
  Using cached virtualenv-14.0.6-py2.py3-none-any.whl
Installing collected packages: virtualenv
Exception:
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/site-packages/pip/basecommand.py", line 209, in main
    status = self.run(options, args)
  File "/usr/local/lib/python2.7/site-packages/pip/commands/install.py", line 317, in run
    prefix=options.prefix_path,
  File "/usr/local/lib/python2.7/site-packages/pip/req/req_set.py", line 731, in install
    **kwargs
  File "/usr/local/lib/python2.7/site-packages/pip/req/req_install.py", line 841, in install
    self.move_wheel_files(self.source_dir, root=root, prefix=prefix)
  File "/usr/local/lib/python2.7/site-packages/pip/req/req_install.py", line 1040, in move_wheel_files
    isolated=self.isolated,
  File "/usr/local/lib/python2.7/site-packages/pip/wheel.py", line 343, in move_wheel_files
    clobber(source, lib_dir, True)
  File "/usr/local/lib/python2.7/site-packages/pip/wheel.py", line 321, in clobber
    shutil.copyfile(srcfile, destfile)
  File "/usr/local/lib/python2.7/shutil.py", line 83, in copyfile
    with open(dst, 'wb') as fdst:
IOError: [Errno 13] Permission denied: '/usr/local/lib/python2.7/site-packages/virtualenv.pyc'



[duser@q-dev-5461-4f3c-9d98-7af28dfc3ec6 bin]$ sudo pip2.7 install virtualenv
sudo: pip2.7: command not found

---

如错误消息中所述，pip2.7不能作为命令使用。那么，您是如何调用

pip

来安装其他Python软件包的呢？在我的系统上，我可以访问Python 2的

pip

，以及Python 3的

pip3

。您可以通过使用

which pip

和

which pip3

查找这些命令的路径来尝试这一点。当我没有在前面输入“sudo”时，它怎么能找到呢？su用户的$PATH似乎不正确，不是编程问题，属于超级用户或Unix&Linux。您有

pip2.7

作为用户别名吗？如果是这样，那就是问题所在。将相同的

别名添加到su的shell配置中。