I'm using a remote server, which some others use together. 

There are several versions of python installed. 

I need python 3.6 version, and I can run it with `/bin/python3.6` command. 

And I also want to make a virtualenv of the version, so I tried `/bin/python3.6 -m pip --version` 

But it showed

```none
/bin/python3.6: No module named pip

```

When I checked the lib directory, `ll /usr/lib/python3.6/site-packages/`

```none
total 0 drwxr-xr-x 2 root root 6 Dec 20  2017 __pycache__

```

It seems that the server has python3.6, but misses pip for that, right? 

How can I resolve this, with the minimum modification? 

The server is centos7. 

Any thought or comment appreciated :)