(0) preparation ulimit -n If your console shows 1024, it is insufficient. Please add following lines to your /etc/security/limits.conf file and reboot your machine. root soft nofile 65536 root hard nofile 65536 (1) install Fluentd // “Ubuntu 12.04 LTS / Precise” curl -L http://toolbelt.treasuredata.com/sh/install-ubuntu-precise.sh | sh /etc/init.d/td-agent start/stop/restart/status // test curl -X POST -d 'json={"json":"message"}' http://localhost:8888/debug.test /etc/init.d/td-agent stop chown: changing ownership of `/var/run/td-agent/td-agent.pid': Operation not permitted chown: changing ownership of `/var/run/td-agent': Operation not permitted * Stopping td-agent td-agent ...