elk
/usr/local/etc/elasticsearch-6.5.1
/usr/local/Cellar/logstash/6.5.1/
./logstash -f
/usr/local/Cellar/kibana/6.5.1/
==================================
nginx
/usr/local/Cellar/nginx/1.15.8
/usr/local/etc/nginx/nginx.conf
/usr/local/etc/nginx/servers/
==================================
logrotate crontab
/usr/local/Cellar/logrotate/3.14.0
/usr/local/etc/logrotate.conf
/usr/bin/crontab
/var/mail/LM
==================================
mysql
/usr/local/Cellar/mysql@5.5/