| docker system prune & docker system prune --volumes |
| https://unix.stackexchange.com/a/210601/171474 | |
| I had a very similar issue. It seems to come from the use of python3 instead of python2.7 | |
| I had /usr/bin/python linked to python3 (I changed the link after installing python3 for greater convenience, it looks like aliasing is a much better idea). | |
| Anyway, after unlinking it and relinking it to python2.7 upgrade worked fine. | |
| Never overwrite /usr/bin/python to python3, this would cause apt-get and several other to fail. |
Creating an alias will not be the best way to do it.
Using update-alternatives
sudo update-alternatives --install /usr/bin/python python /usr/bin/python3.5 1
sudo update-alternatives --install /usr/bin/python python /usr/bin/python2.7 2
sudo update-alternatives --config python Enter 2 for Python 2.7.
