Following my article yesterday on the quick and dirty way to install Cherokee web server on a Raspberry Pi I feel I need to explain how to fix a potential problem you may encounter. The latest version of Rasbian for the Raspberry Pi comes with Mathematica and Wolfram language and I noticed that once Cherokee was installed and set to start on boot it was causing conflicts that would prevent dpkg from installing any more packages due to a conflicting loop in the Cherokee and Mathematica startup scripts. I wrote a post on the Raspberry Pi forums about it. If you try to install a package using apt-get install and noticed any of these errors:
insserv: there is a loop between service cherokee and mathkernel if stopped
insserv: loop involving service mathkernel at depth 2
insserv: loop involving service cherokee at depth 1
sub-process /usr/bin/dpkg returned an error code (1)
Then you may benefit from following the steps below.
This is a quick and dirty workaround to fix it. Please be aware that this may render Mathematica inoperable but for me at least a running web server is more important. To fix this problem type in your terminal:
sudo mv /etc/init.d/mathkernel /home/pi
This will remove the Mathematica startup script from /etc/init.d and place it in /home/pi. This is assuming you didn't rename your main user account to something else. If you did replace the pi with your username.
sudo update-rc.d cherokee defaults
This should reinitialise the offending Cherokee script without the conflicts arising from Mathematica. To test this you can try and install a new or failed package. Rebooting might also be a good idea.
I hope this article was useful.