$ uname -a
Linux debian 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt11-1+deb8u6 (2015-11-09) x86_64 GNU/Linux
$ python --version
Python 2.7.9
$ pip --version
pip 8.1.1 from /usr/local/lib/python2.7/dist-packages (python 2.7)
$ unset LC_ALL
$ pip install virtualenv
Traceback (most recent call last):
File "/usr/local/bin/pip", line 11, in <module>
sys.exit(main())
File "/usr/local/lib/python2.7/dist-packages/pip/__init__.py", line 215, in main
locale.setlocale(locale.LC_ALL, '')
File "/usr/lib/python2.7/locale.py", line 579, in setlocale
return _setlocale(category, locale)
locale.Error: unsupported locale setting
$ export LC_ALL=C 这里是重点
$ pip install virtualenv