[email protected]:$ virtualenv -p /usr/bin/python2 env
Traceback (most recent call last):
  File "/usr/bin/virtualenv", line 5, in <module>
    from pkg_resources import load_entry_point
ImportError: No module named 'pkg_resources'

解決方法：
解除安裝virtualenv，重新安裝

aptitude show virtualenv#顯示已安裝軟體資訊
 

dpkg -L virtualenv#檢視安裝位置
sudo pip uninstall virtualenv
pip install -i https://pypi.mirrors.ustc.edu.cn/simple/ virtualenv
[email protected]:~$ virtualenv env

#報錯
bash: /usr/bin/virtualenv: 沒有那個檔案或目錄

將virtualenv安裝路徑新增到系統路徑

#得到安裝位置
pip install -i https://pypi.mirrors.ustc.edu.cn/simple/ virtualenv
[email protected]
 
:~$ virtualenv env
Requirement already satisfied: virtualenv in /usr/local/lib/python2.7/dist-packages  

#將安裝位置新增到系統路徑：
cd ~
sudo vi .bashrc

#在最後一行新增
export PATH="/usr/lib/graphviz:/usr/bin:/bin:/usr/local/bin:/usr/local/lib/python2.7/dist-packages"
#立即生效
source .bashrc

#建立env
virtualenv -p python2 fcn_env
#報錯
 

...Installing setuptools, pip, wheel...done.
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/virtualenv.py", line 2328, in <module>
    main()
  File "/usr/local/lib/python2.7/dist-packages/virtualenv.py", line 713, in main
    symlink=options.symlink)
  File "/usr/local/lib/python2.7/dist-packages/virtualenv.py", line 945, in create_environment
    download=download,
  File "/usr/local/lib/python2.7/dist-packages/virtualenv.py", line 901, in install_wheel
    call_subprocess(cmd, show_stdout=False, extra_env=env, stdin=SCRIPT)
  File "/usr/local/lib/python2.7/dist-packages/virtualenv.py", line 797, in call_subprocess
    % (cmd_desc, proc.returncode))
OSError: Command /home/suanfa/fcn_env/bin/python2 - setuptools pip wheel failed with error code 2

pip -V
sudo pip install --upgrade pip
Requirement already up-to-date: pip in ./.local/lib/python2.7/site-packages
#將/.local/lib/python2.7/site-packages新增到系統路徑
#使生效
source .bashrc

#再次建立
aaa@dockerserver:~$ virtualenv -p python2 fcn_env
Running virtualenv with interpreter /usr/bin/python2
New python executable in /home/suanfa/fcn_env/bin/python2
Not overwriting existing python script /home/suanfa/fcn_env/bin/python (you must use /home/suanfa/fcn_env/bin/python2)
Installing setuptools, pip, wheel...done.

OK…