Also, note that the last CK version had an issue with fresh pip
installation.
It is fixed now and you can get the new version via
$ (sudo) pip install ck –U
If you use python3 and python2 at the same time on Linux,
and you installed CK for python3, you may need to set CK_PYTHON
to python3, i.e.
$ export CK_PYTHON=python3
$ ck status
Have a good weekend,
Grigori