I get that when I reinstall sat: symbolically linking /usr/local/lib/python2.7/dist-packages/sat/sat.sh -> /usr/local/bin/sat error: [Errno 17] File exists Normally this doesn't happen because setup.py removes the previous link, but when /usr/local/bin/sat is not a link but a regular file, it is not removed. Not sure if this is a bug or not... what to do? Force removing the regular file? Leave it as it is? BTW, why do we have a regular file, is it installed by the .deb package?