Adjusting Concierge Log Level
From BUG Wiki
Concierge, the OSGi framework running on the BUG, emits debug information to /var/log/concierge.log. The framework supports 4 log levels, as defined on this page. You can adjust the log levels by changing the ch.ethz.iks.concierge.log.level property in /usr/share/java/system.properties file.
The log level can be 0 = NONE, 1 = LOG_ERROR, 2 = LOG_WARNING, 3 = LOG_INFO or 4 = LOG_DEBUG. The larger level includes all smaller levels.
This will require a restart of concierge, to do so run this command: /etc/init.d/concierge restart
-or- just reboot your BUG.