Sebastian ’tokkee’ Harl is engaged in Linux and Open Source software for many years. Besides actively working on projects like Debian (www.debian.org), collectd (www.collectd.org), and RRDtool (oss.oetiker.ch/rrdtool), he actively supports various Open Source events (e.g., FrOSCon, www.froscon.org, Grazer Linuxtage, linuxtage.at) by staffing booths and giving talks. His main interests are monitoring, configuration / system management, and performance analysis.