/usr/bin/yes
rm -r /some/dir
touch /tmp/haha
chmod 000 /tmp/haha
rm /tmp/haha

/usr/bin/yes
/etc/lilo.conf
/etc/resolv.conf
/tmp/TIMESTAMP
echo " BACKUP OF fileserver STARTED " >>
/var/log/bkuplogs/fileserver/mainlog

/var/log/messages
Dec 22 12:27:13 www httpd: httpd startup failed

/usr/sbin/httpd
Segmentation fault (core dumped)

core: ELF 32-bit LSB core file of 'httpd' (signal 11), Intel 80386,
version 1, from 'httpd'

/usr/sbin/httpd
/etc/init.d/httpd
/etc/init.d/apache
/etc/init.d/
#!/bin/bash
exec strace -f -o /tmp/apache/strace.out /usr/sbin/httpd.real "$@"

/tmp/apache
/etc/resolv.conf
Defect    --------->  Error  -------------> Fault

(Improper          (Something bad       (Result becomes
code construct)     happens)             observable as
                                         unexpected result)

#!/bin/bash
exec strace -f -o /tmp/apache/strace.out /usr/sbin/httpd.real "$@"

/tmp/apache
 exec()
 fork()
 fork()
/bin/bash
 execve()
 clone()
 printf()
 execle()
 execve()
 execvp()
execlp()
execl()
 execv()
"fork()
$@
$*
$*
$@
$@
$*
$@
$*
$*
$@
$#
 #!/bin/bash
 OLDMASK=$(umask)
 umask 077
 TMPDIR=/tmp/$(basename $1)$$
 mkdir "$TMPDIR" || exit 1
  ## make a temporary directory or die
 umask $OLDMASK
 TARGETCMD="$1"
 shift
 exec strace -f -o "$TMPDIR/strace.out" "$TARGETCMD" "$@"

#!/usr/local/bin/perl -w
# @(#) SEPclientPGP.pl	Secure Email Print client program. Ref: RFC 3156.
#			Takes incoming stream and generates PGP-signed message
#			which is piped to split-and-send program for email
#			transmission to server. Requires 'pgp' program.
#			Graham Jenkins, IBM GSA, Dec. 2001. [Rev'd 2001-12-30]

use strict;
use File::Basename;
use MIME::Lite;
use IO::File;
use Env qw(PGPPASS);

die "Usage: ".basename($0)." kb-per-part destination [passphrase]\n".
    " e.g.: ".basename($0)." 16 lp3\@pserv.acme.com \"A secret\" < report.ps\n".
    "       Part-size must be >= 1\n"
  if ( ($#ARGV < 1) or ($#ARGV > 2) or ($ARGV[0] < 1) );

my $fh = new IO::File "| /usr/local/bin/SplitSend.pl $ARGV[0]";
if( defined($ARGV[2]) ) {$PGPPASS=$ARGV[2]}
if( ! defined ($PGPPASS)) {$PGPPASS=""}	# Plant passphrase in environment and
my $msg = MIME::Lite->new(		# create signed message.
                To      => $ARGV[1],
                Subject => 'Secure Email Print Job # '.time,
                Type    => 'multipart/encrypted');
$msg->attr  (   "content-type.protocol" => "pgp-encrypted");
$msg->attach(   Type    => 'application/pgp-encrypted',
                Encoding=> 'binary',
                Data    => "Version: 1\n");
$msg->attach(   Type    => 'application/octet-stream',
                Encoding=> 'binary',
                Path    => "/usr/local/bin/pgp -fas - |");
$msg->print($fh);			# Pipe the signed message into a
__END__					# split-and-send program.

#!/usr/local/bin/perl -w
# @(#) SplitSend.pl	Splits and sends an email message (Ref: RFC 1521, 2046).
#			Graham Jenkins, IBM GSA, December 2001.

use strict;
use File::Basename;
use MIME::Lite;
use Net::Domain;
my ($Id,$j,$Dest,$Subj,$part,$InpBuf,$OutBuf,$Number,$Total);

die "Usage: ".basename($0)." kb-per-part\n".
    "       Part-size must be >= 1\n" if ( ($#ARGV != 0) or ($ARGV[0] < 1) );

$Id=(getlogin."\@".Net::Domain::hostfqdn().time) or $Id="unknown_user".time;
$Number = 0; $Total = ""; $OutBuf=""; $InpBuf=""; print STDERR "\n";

sub do_output {				# Output subroutine.
  die basename($0)." .. destination undefined!\n" if ! defined($Dest);
  $Subj = ""                                      if ! defined($Subj);
  if ($OutBuf ne "") {			# If output buffer contains data, 
    $Number++;				# increment Number, and check whether
    $Total=$Number if $InpBuf eq "";	# it is the last buffer.
    print STDERR "Sending part: ", $Number,"/",$Total,"\n";
    $part = MIME::Lite->new(
              To      => $Dest,		# Construct a message containing the
              Subject => $Subj,		# output buffer contents.
              Type    => 'message/partial',
              Encoding=> '7bit',
              Data    => $OutBuf);
    $part->attr("content-type.id"     => "$Id");
    $part->attr("content-type.number" => "$Number");
    $part->attr("content-type.total"  => "$Total") if ($Number eq $Total);
    $part->send;			# Send the message.
  }
  $OutBuf = $InpBuf;			# Move input buffer contents to
  $InpBuf = ""				# output buffer and exit.
}

while (<STDIN>) {			# Main loop.
  if ( (substr($_, 0, 3) eq "To:")      && (! defined($Dest)) ) {
    $Dest = substr($_, 4, length($_) - 4); chomp $Dest; next }
  if ( (substr($_, 0, 8) eq "Subject:") && (! defined($Subj)) ) {
    $Subj = substr($_, 9, length($_) - 9); chomp $Subj; next }
  if ( (length($InpBuf . $_)) > ($ARGV[0] * 1024) ) {do_output}
  $InpBuf = $InpBuf . $_
}
foreach $j (1,2) {do_output}		# Flush both buffers and exit.
__END__

          for ($k=1;$k<=$tp{$part[0]};$k++){	# Check if we have all parts.
            goto I if ! defined($slot{$part[0]."=".$k});
          }					
          $fh=new IO::File
           "| /usr/local/bin/pgp -f 2>$tmp | lpr -P $user >/dev/null" or goto I;
          for ($k=1;$k<=$tp{$part[0]};$k++){	# Assemble parts into pipe. 
            $message=$pop->get($slot{$part[0]."=".$k});
            $l=0; $buffer=""; $print="N";
            while ( defined(@$message[$l]) ) {
              chomp @$message[$l]; 		# Part 1: start at "-----BEGIN",
              if( $k == 1 ) {			# stop before 2nd blank line.
                if( @$message[$l]=~m/^-----BEGIN/ ) { $m=-2;  $print="Y"}
                if( $print eq "Y" ) {
                  if( @$message[$l] eq "" ) { $m++; if( $m >= 0)   {last} } 
                  $buffer=$buffer.@$message[$l]."\n"
                }
              }					# Part 2,3,..: skip 1 blank line
              else {				# after "id=", then start; stop
                if( $print eq "Y" ) {		# before next blank line.
                  if( @$message[$l] eq "" )                        {last} 
                  $buffer=$buffer.@$message[$l]."\n"
                }
                if( @$message[$l]=~m/id=/ )                  {$print="R"}
                if((@$message[$l] eq "") && ($print eq "R")) {$print="Y"}
              }
              $l++;
            }
            print $fh $buffer or goto I;
          }
          $fh->close || goto I;
          open $fh, $tmp;
          while (<$fh>) { chomp; syslog('info', $_) }
          close $fh;
          for ($k=1;$k<=$tp{$part[0]};$k++){
            $pop->delete($slot{$part[0]."=".$k})
          }
          goto I;
        }
J:    }	
    }
I:}


LinuxWorld Conference & Expo (IDG)	January 30 - February 1, 2002 New York, NY http://www.linuxworldexpo.com/

The Tenth Annual Python Conference ("Python10")	February 4-7, 2002 Alexandria, Virginia http://www.python10.com/

Australian Linux Conference	February 6-9, 2002 Brisbane, Australia http://www.linux.org.au/conf/

Internet Appliance Workshop	February 19-21, 2002 San Jose, CA http://www.netapplianceconf.com/

Internet World Wireless East (Penton)	February 20-22, 2002 New York, NY http://www.internetworld.com/events/weast2002/

Intel Developer Forum (Key3Media)	February 25-28, 2002 San Francisco, CA http://www.intel94.com/idf/index2.asp

COMDEX (Key3Media)	March 5-7, 2002 Chicago, IL http://www.key3media.com/comdex/chicago2002/

BioIT World Conference & Expo (IDG)	March 12-14, 2002 Boston, MA http://www.bioitworld.com/

Embedded Systems Conference (CMP)	March 12-16, 2002 San Francisco, CA http://www.esconline.com/sf/

CeBIT (Hannover Fairs)	March 14-22, 2002 Hannover, Germany http://www.cebit.de/

COMDEX (Key3Media)	March 19-21, 2002 Vancouver, BC http://www.key3media.com/comdex/vancouver2002/

FOSE	March 19-21, 2002 Washington, DC http://www.fose.com/

Game Developers Conference (CMP)	March 19-23, 2002 San Jose, CA http://www.gdconf.com/

LinuxWorld Conference & Expo Singapore (IDG)	March 20-22, 2002 Singapore http://www.idgexpoasia.com/

Software Solutions / eBusiness World	March 26-27, 2002 Toronto, Canada http://www.softmatch.com/soln20.htm#ssebw

SANS 2002 (SANS Institute)	April 7-9, 2002 Orlando, FL http://www.sans.org/newlook/home.htm

LinuxWorld Conference & Expo Malaysia (IDG)	April 9-11, 2002 Malaysia http://www.idgexpoasia.com/

LinuxWorld Conference & Expo Dublin (IDG)	April 9-11, 2002 Dublin, Ireland

Internet World Spring (Penton)	April 22-24, 2002 Los Angeles, CA http://www.internetworld.com/events/spring2002/

O'Reilly Emerging Technology Conference (O'Reilly)	April 22-25, 2002 Santa Clara, CA http://conferences.oreillynet.com/etcon2002/

Software Development Conference & Expo, West (CMP)	April 22-26, 2002 San Jose, CA http://www.sdexpo.com/

Networld + Interop (Key3Media)	May 7-9, 2002 Las Vegas, NV http://www.key3media.com/

Strictly e-Business Solutions Expo (Cygnus Expositions)	May 8-9, 2002 Minneapolis, MN http://www.strictlyebusiness.net/strictlyebusiness/index.po?

Embedded Systems Conference (CMP)	June 3-6, 2002 Chicago, IL http://www.esconline.com/chicago/

USENIX Annual (USENIX)	June 9-14, 2002 Monterey, CA http://www.usenix.org/events/usenix02/

PC Expo (CMP)	June 25-27, 2002 New York, NY http://www.techxny.com/

O'Reilly Open Source Convention (O'Reilly)	July 22-26, 2002 San Diego, CA http://conferences.oreilly.com/

USENIX Securty Symposium (USENIX)	August 5-9, 2002 San Francisco, CA http://www.usenix.org/events/sec02/

LinuxWorld Conference & Expo (IDG)	August 12-15, 2002 San Francisco, CA http://www.linuxworldexpo.com

LinuxWorld Conference & Expo Australia (IDG)	August 14 - 16, 2002 Australia http://www.idgexpoasia.com/

Communications Design Conference (CMP)	September 23-26, 2002 San Jose, California http://www.commdesignconference.com/

Software Development Conference & Expo, East (CMP)	November 18-22, 2002 Boston, MA http://www.sdexpo.com/

February 2002, Issue 75 Published by Linux Journal

Table of Contents:

Linux Gazette Staff and The Answer Gang

Copyright © 1996-2002 Specialized Systems Consultants, Inc.

Comments on: Play with the lovely netcat

The purpose of yes

Author of Netcat

LG #74 Mailbag: Desktop support

pls pass this onto Dennis Field - his email doesn't work

Regarding all these comments about desktop support ---

Good attitude!

Mountpoint permissions

Sorry / Saludos

attn: Ben Okopnik et al

Tux' Gender

re: Lady Penguins

All the Girls like him

This page edited and maintained by the Editors of Linux Gazette Copyright © 2002 Published in issue 75 of Linux Gazette February 2002

HTML script maintained by Heather Stern of Starshine Technical Services, http://www.starshine.org/

More 2¢ Tips!

pseudo-chroot

See LILO only when you need it

Active Directory...

CSS2? Try XML and its kin instead

Linux with win2000

Cable Modem Setup

read a timestamp... the EASY way

How to manually label a tape in linux

Problem faced while using script to backup

Posters for [LG 72] help wanted #7

This page edited and maintained by the Editors of Linux Gazette Copyright © 2002 Published in issue 75 of Linux Gazette February 2002

HTML script maintained by Heather Stern of Starshine Technical Services, http://www.starshine.org/

The Answer Gang

By Jim Dennis, Ben Okopnik, Dan Wilder, Breen, Chris, and... (meet the Gang) ... the Editors of Linux Gazette... and You! Send questions (or interesting answers) to the Answer Gang for possible publication

Contents:

Greetings from Heather Stern

How does one examine a core file

This page edited and maintained by the Editors of Linux Gazette Copyright © 2002 Published in issue 75 of Linux Gazette February 2002

HTML script maintained by Heather Stern of Starshine Technical Services, http://www.starshine.org/

"Linux Gazette...making Linux just a little more fun!"

Contents:

February 2002 Linux Journal

Legislation and More Legislation

Jon Johansen Indicted by Norwegian Authorities Regarding DeCSS

Support From Washington

UCITA

Legislative Links

Linux Links

Upcoming conferences and events

News in General

Euro Support

Athlon/Duron and Linux Bug

Linux Adoption

Penguin Art

Linux Trojan Found

DOSSIER, Documentation Source

Distro News

BrlSpeak

Debian

Mandrake

Red Hat

Software and Product News

GUI Based DSSSL/XSLT DocBook Tool Released

Adobe GoLive 6 Integrates Zend PHP Debugger

CxProtect

Mahogany 0.64 Released

Copyright © 2002, Michael Conry and the Editors of Linux Gazette. Copying license http://www.linuxgazette.com/copying.html Published in Issue 75 of Linux Gazette, February 2002

"Linux Gazette...making Linux just a little more fun!"

Secure Printing with PGP

By Graham Jenkins

The Brother Internet Print Protocol

A Hole Big Enough to Drive a Truck Through

Who's Printing Pamela Anderson Pictures?

Appeasing the Standards Nazis

The Client Program

Split-and-Send

The Art of Jigsaw Assembly

Copycat Crime

GNU Privacy Guard

Graham Jenkins

This page edited and maintained by the Editors of Linux Gazette Copyright © 2002
Published in issue 75 of Linux Gazette February 2002

This page edited and maintained by the Editors of Linux Gazette Copyright © 2002
Published in issue 75 of Linux Gazette February 2002

By Jim Dennis, Ben Okopnik, Dan Wilder, Breen, Chris, and... (meet the Gang) ... the Editors of Linux Gazette... and You!
Send questions (or interesting answers) to the Answer Gang for possible publication

This page edited and maintained by the Editors of Linux Gazette Copyright © 2002
Published in issue 75 of Linux Gazette February 2002

Copyright © 2002, Michael Conry and the Editors of Linux Gazette.
Copying license http://www.linuxgazette.com/copying.html
Published in Issue 75 of Linux Gazette, February 2002

Copyright © 2002, Graham Jenkins.
Copying license http://www.linuxgazette.com/copying.html
Published in Issue 75 of Linux Gazette, February 2002

By G James Jones
Originally published at System Toolbox. Reprinted with permission.