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Logcheck(8) System Manager's Manual Logcheck(8)
jjm@debian.org
Jon Middleton 2004Jon MiddletonMay 3, 2005;
NAME
logcheck -- program to scan system logs for interesting lines
SYNOPSIS
logcheck [OPTIONS]
DESCRIPTION
The logcheck program helps spot problems and
security violations in your logfiles automatically and will send the
results to you periodically in an e-mail. By default logcheck runs as
an hourly cronjob just off the hour and after every reboot.
logcheck supports three level of filtering:
"paranoid" is for high-security machines running as few services
as possible. Don't use it if you can't handle its verbose messages.
"server" is the default and contains rules for many different daemons.
"workstation" is for sheltered machines and filters most of the mes-
sages.
The ignore rules work in additive manner. "paranoid" rules are also
included at level "server". "workstation" level includes both "para-
noid"
and "server" rules.
The messages reported are sorted into three layers, system events,
security events and attack alerts. The verbosity of system events is
controlled by which level you choose, paranoid, server or workstation.
However, security events and attack alerts are not affected by this.
EXAMPLES
logcheck can be invoked directly thanks
to su(8) or sudo(8), which change the user ID. The following example
checks the logfiles
without updating the offset and outputs everything to STDOUT.
sudo -u logcheck logcheck -o -t
OPTIONS
A summary of options is included below.
-c CFG Overrule default configuration file.
-d Debug mode.
-h Show usage information.
-H Use this hostname string in the subject of logcheck mail.
-l LOG Run logfile through logcheck.
-L CFG Overrule default logfiles list.
-D DIR Overrule default logfiles lists directory.
-m MAIL Mail report to recipient.
-o STDOUT mode, not sending mail.
-p Set the report level to "paranoid".
-r DIR Overrule default rules directory.
-R Adds "Reboot:" to the email subject line.
-s Set the report level to "server".
-S DIR Overrule default state directory.
-t Testing mode does not update offset.
-T Do not remove the TMPDIR.
-u Enable syslog-summary.
-v Print current version.
-w Set the report level to "workstation".
FILES
/usr/local/etc/logcheck/logcheck.conf is the main configuration file.
/usr/local/etc/logcheck/logcheck.logfiles is the list of files to monitor.
/usr/local/etc/logcheck/logcheck.logfiles.d is the directory of lists of
files to monitor.
/usr/local/share/doc/logcheck/README.logcheck-database for hints on how to
write, test and maintain rules.
EXIT STATUS
0 upon success; 1 upon failure
SEE ALSO
logtail(8)
AUTHOR
logcheck is developed by Debian logcheck Team at:
https://salsa.debian.org/debian/logcheck.
This manual page was written by Jon Middleton.
Logcheck(8)
NAME | SYNOPSIS | DESCRIPTION | EXAMPLES | OPTIONS | FILES | EXIT STATUS | SEE ALSO | AUTHOR
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