草稿：syslog 日志切割

vim /etc/logrotate.d/nginx

/var/log/nginx/*.log {
  daily
  missingok
  rotate 3
  compress
  dateext
  ifempty
  create 600 www www
  sharedscripts
  postrotate
  [ -f /usr/local/nginx/nginx/logs/nginx.pid ] && kill -USR1 `cat /usr/local/nginx/nginx/logs/nginx.pid`
  endscript
}

logrotate -vf /etc/logrotate.d/nginx