My central syslog server creates a folder hierarchy as follows:

/data/logs/[system name]/month/day.log

Sometime I need to grep multiple logs across several specific devices.  Using find, grep and xargs we can accomplish this as follows:

find *server* -type f | grep 08/03.log | xargs grep interesting_traffic

The above will return a list of all the files within any folder containing the phrase `server`, then it filters out the logs for the date 08/03 and lastly it greps them for the phrase `interesting_traffic`.  Easy!