Logcheck(8)

      jjm@debian.org
           Jon Middleton 2004 Jon Middleton May 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 messages.
    The ignore rules work in additive manner. "paranoid" rules are also
    included at level "server". "workstation" level includes both "paranoid"
    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 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.