預防log檔案過大 Prevent your log files from getting out of control

修改這兩個檔案
/etc/logrotate.conf
/var/log/syslog

詳細內容可以參考
http://blog.netflowdevelopments.com/2012/03/13/prevent-your-log-files-from-getting-out-of-control-in-debian-squeeze/