I run Debian unstable. I've installed boinc-client and boinc-manager packages. When i run boincmgr, it first says "Retrieving current status" and then "Unable to connect to the core client". http://boinc.berkeley.edu/wiki/Installing_BOINC_on_Debian and http://wiki.debian.org/BOINC weren't helpful. I did the following command:
$ sudo /etc/init.d/boinc-client status
Status of BOINC core client: running
How to make BOINC work on Debian?