The fetchlog utility displays the last new messages of a logfile. 
It is similar like tail (1) but offers some extra functionality for
output formatting. To show only the new messages appeared since the 
last call fetchlog uses a bookmark to remember which messages have 
been fetched. 

fetchlog works on syslog generated logfiles as well as other logfiles.

fetchlog can be used standalone or as a Nagios (TM) plugin.  Together
with Net-SNMP one can look at/monitor new messages in remote logfiles.

WWW: http://fetchlog.sourceforge.net/

-Alexander Haderer
alexander.haderer@charite.de