karaf.log appears on the root file system when running Minion/Sentinel on Ubuntu/Debian.

On CentOS/RHEL, the karaf.log is placed on /opt/minon/data/log or /opt/sentinel/data/log.

When running any of these applications on Ubuntu/Debian, the karaf.log is "temporary" created on /usr/share/minion/data/log or /usr/share/sentinel/data/log, but then a file on the root filesystem is created and all the log is redirected there (i.e. either /minion.log or /sentinel.log). This is a problem if you want to run Sentinel/Minion as non-root on Ubuntu/Debian, as a normal user doesn't have permissions to write on the root filesystem.