logtail(8) [debian man page]

LOGTAIL(8)							  logtail manual							LOGTAIL(8)

NAME

       logtail - print log file lines that have not been read

SYNOPSIS

       logtail [-t] -flogfile [-ooffsetfile]

DESCRIPTION

       logtail	reads  a specified file (usually a log file) and writes to the standard output that part of it which has not been read by previous
       runs of logtail.  It prints the appropriate number of bytes from the end of logfile, assuming that all changes that are made to it  are	to
       add new characters to it.

       logfile must be a plain file.  A symlink is not allowed.

       logtail stores the information about how much of it has already been read in a separate file called offsetfile.	offsetfile can be omitted.
       If omitted, the file named logfile.offset in the same directory which contains logfile is used by default.

       If offsetfile is not empty, the inode of logfile is checked.  If the inode is changed, logtail simply prints the entire file.  If the inode
       is not changed but logfile is shorter than it was at the last run of logtail, it writes a warning message to the standard output.

OPTIONS

       -f     logfile to be read after offset

       -o     offsetfile stores offset of previous run

       -t     test mode - do not change offset in offsetfile

RETURN VALUES

       0      successful

       65     cannot get the size of logfile

       66     logfile does not exist, is not a plain file, or is not readable

       73     cannot write offsetfile

AUTHOR

       The  original  logtail  was written in C by Craig H. Rowland <crowland@psionic.com>.  This version of logtail is a Perl reimplementation by
       Paul Slootman <paul@debian.org>.  Enhanced by the Debian Logcheck Team <logcheck-devel@lists.alioth.debian.org>.

       This manual was written by Oohara Yuuma <oohara@libra.interq.or.jp>.

SEE ALSO

       logcheck(8)

Debian								 Fri, 19 Nov 2004							LOGTAIL(8)

Logcheck(8)						      System Manager's Manual						       Logcheck(8)

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 periodi-
       cally 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 shel-
       tered 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.

       -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.

       /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)