04-28-2005
How to scan only new lines added in file?
Hi,
I am planning to implement a scheduled script that will go against my log files (every hour), search for a set of key words (errors, exceptions, faults etc). The script must be intelligent enough to scan only the new lines added to the log file since it last ran.
I can use grep for searching, how can I scan only new lines added to the log file since it last ran?
Any idea? any sample script?
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LEARN ABOUT DEBIAN
torrus_monitor
TORRUS_MONITOR(8) torrus TORRUS_MONITOR(8)
NAME
monitor - Torrus Monitor.
SYNOPSIS
torrus monitor --tree=TREENAME [options...]
DESCRIPTION
This command starts the Monitor process for the tree TREENAME. By default it forks into a daemon, sets the log output file to
/var/log/torrus/monitor.TREENAME.log, performs one monitoring cycle, and sleeps until the next cycle is scheduled. In daemon mode the log
file can be reopened by sending it a SIGHUP signal.
OPTIONS
--nodaemon
Prevents the process from becoming a daemon and sets the log to STDERR.
--runonce
Instructs the script to run once and exit. Implies --nodaemon.
--delay=N
Makes the daemon sleep for N minutes before starting the first cycle. This would happen on the daemon startup and also after each
configuration recompilation. For example, when monitor and collector start simultaneously, the collector needs some time to retrieve
the data being monitored.
--debug
Sets the log level to debug.
--verbose
Sets the debug level to info.
--help
Displays a help message.
FILES
/etc/torrus/conf/torrus-siteconfig.pl
Torrus site configuration script.
/var/log/torrus/monitor.TREENAME.log
Monitor's log for the tree TREENAME.
SEE ALSO
torrus(8)
NOTES
See more documentation at Torrus home page: http://torrus.org
AUTHOR
Stanislav Sinyagin <ssinyagin@yahoo.com>
torrus 2.03 2013-07-26 TORRUS_MONITOR(8)