NAME

       fcheck - IDS filesystem baseline integrity checker

SYNOPSIS

       fcheck [OPTIONS]

OPTIONS

       The options to fcheck are defined below:

       -a  Automatic mode, do all directories in configuration file.

       -c  Create a new base line database for the given directory.

       -d  Directory names are to be monitored for changes also.

       -f filename
           Use alternate 'filename' as the configuration file.

       -i  Ignore creation times, check permissions, adds, deletes only.

       -h  Append the $HOSTNAME to the configuration filename.

       -l  Log information to logger rather than stdout messages.

       -r  Report mode, great for emailed status reports.

       -s  Sign each file with a CRC/hash signature.

       -v  Verbose mode, not used for report generation.

       -x  eXtended unix checks, # of links, UID, GID, Major/Minor checks.

DESCRIPTION

   Overview
       The  fcheck  utility  is  an IDS (Intrusion Detection System) which can be used to monitor changes to any
       given filesystem.

       Essentially, fcheck has the ability to  monitor  directories,  files  or  complete  filesystems  for  any
       additions,  deletions, and modifications.  It is configurable to exclude active log files, and can be ran
       as often as needed from the command line or cron making it extremely difficult to circumvent.

   Operation and Getting Started
       Flag passing is a fairly simple process. Primarily you  will  be  using  two  commands.  One  builds  (or
       rebuilds) your baseline database files (system snapshots). The second runs in a scanning comparison mode.

       "fcheck -ac"

       Builds the baseline database.

       "fcheck -a"

       Comparison scans the system against the baseline database.

       For  normal  operation:  Initially  you will run fcheck by issuing the command "fcheck -ac" to create the
       initial baseline file used for comparison. Any runs after the creation of the basline  will  normally  be
       with the following flags "fcheck "-a"" to scan for any system modifications.

       After  a scan is completed, you will probably want to have fcheck re-create its baseline database for the
       next comparison cycle. Otherwise you will be seeing every system modification since the last baseline re-
       build. In other words, run the "fcheck -ac" command again.

       (Advanced Note:) A more intensive system check would be accomplished by building your database to include
       GID/UID checks, directories, and CRC checks by using the following sample syntax:

         "fcheck -cadsxlf /etc/fcheck/fcheck.cfg"

       And provide periodic integrity scans from cron by using the following sample syntax:

         "fcheck -adsxlf /etc/fcheck/fcheck.cfg"

AUTHOR

       Author: Copyright (C) 1996 Michael A. Gumienny <gumienny@hotmail.com>

       Debianized by: Graham Simpson <gsi@eggconnect.net>

SEE ALSO

       Please  also  refer  to  the  excellent  README  and  INSTALL  instructions  provided  with  the  package
       /usr/share/doc/fcheck.

perl v5.38.2                                       2024-06-05                                          FCHECK(8)