ST_SNAPSHOT(1)							      systraq							    ST_SNAPSHOT(1)

NAME

       st_snapshot - calculate checksum and stat ownership and permissions of files

SYNOPSIS

       ST_SUM=sha256sum st_snapshot patterns homepatterns

DESCRIPTION

       st_snapshot calculates checksums and stats ownership and permissions of critical system files.

       This script is typically run in either root-mode or public-mode.  Running this script in root-mode requires root priviliges.  One is
       adviced to set up a dedicated user account for running this script in public mode.

       In root-mode, the files snapshot_root.list and snapshot_root.homelist are typically passed as arguments.  These pattern files are read by
       the script and contain names of files and directories; listing a directory in such a pattern file is equivalent to listing all files which
       live in the directorytree with this directory as root.

       snapshot_root.list could e.g. read

	# snapshot_root.list - files and directories we wanna get
	# monitored: we wanna get a note once these files, or any file
	# under these directories, gets created, gets rm-ed, gets
	# permissions or contents changed.  these notices will not
	# include the possibly secret contents of these files
	#
	# this file gets read by st_systraq
	/etc/group
	/etc/gshadow
	/etc/hosts.allow
	/etc/hosts.deny
	/etc/hosts.equiv
	/etc/lilo.conf
	/etc/passwd
	/etc/postfix/server.pem
	/etc/shadow
	/etc/skel
	/etc/ssh

       Equivalent files snapshot_pub.list and snapshot_pub.homelist should be on the system.  These files should contain all worldreadable to be
       monitored files.  This allows for running this script as root only in those cases where it's needed: when reading files, readable for root
       only.

       The homelist files contain files and directories which should get monitored for every homedirectory on the system.  snapshot_pub.homelist
       could e.g. contain:

	.profile
	.cshrc
	.tcshrc
	.login
	.logout
	.bash_profile
	.bashrc
	.exrc
	.nexrc

       As a special case, when the environment variable ST_OPHOMES is set to a non-empty string (typically when running in public mode), we stat
       the permissions on all homedirectories themselves.

       The produced snapshot is printed to stdout.  The output when running in public mode could look like:

	# ownership and permissions of homedirs
	drwxr-xr-x root root /bin
	drwxr-xr-x root root /dev
	drwxr-sr-x root staff /home
	drwxr-sr-x joostvb joostvb /home/joostvb
	drwxr-xr-x root root /usr/sbin
	drwxr-xr-x root root /var
	# sha256sum of critical pub files
	4d3cd13d6dbc10e2e3ccb9477cbc9eb9b76302454c276d5771ae0b10a5fbb4d2  /home/joostvb/.ssh/id_rsa.pub
	eb8d83e0246f761a21bdfb13a03fac634ed7c3b7dde4c2efddd7b2838d32596f  /var/qmail/alias/.bashrc
	4e371f9a11f5a2464d3d5c952e58e24f73b377d33767ed93b2082fcb59a647fe  /etc/zlogin
	# ownership and permissions of critical pub files
	-rw-rw-r-- joostvb joostvb /home/joostvb/.ssh/id_rsa.pub
	-rw-r--r-- joostvb joostvb /home/joostvb/.ssh/authorized_keys

ENVIRONMENT

       ST_OPHOMES - non-empty in case permissions on all homedirectories should be printed

       ST_SUM - command for calculating file checksums.  E.g. sha256sum, sha512sum, sha384sum, sha224sum or sha1sum.

SEE ALSO

       The systraq manual.

VERSION

       This manpage: $Id: st_snapshot.pod 374 2008-12-14 08:47:32Z joostvb $

COPYRIGHT

       Copyright (C) 2001, 2002, 2003, 2004, 2008 Joost van Baal

       This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by
       the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

       This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

       You should have received a copy of the GNU General Public License along with this program (see COPYING); if not, check with
       http://www.gnu.org/copyleft/gpl.html or write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.

AUTHOR

       Joost van Baal <joostvb-systraq-20041015@mdcc.cx>

20081217							    2008-12-15							    ST_SNAPSHOT(1)