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

       /etc/logcheck/logcheck.conf is the main configuration file.

       /etc/logcheck/logcheck.logfiles is the list of files to monitor.

       /etc/logcheck/logcheck.logfiles.d is the directory of lists of files to monitor.

       /usr/share/doc/logcheck-database/README.logcheck-database.gz 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 alioth: http://alioth.debian.org/projects/logcheck/.

       This manual page was written by Jon Middleton.

                                                                                                     Logcheck(8)