1. Create new file (for example quota_notify inside /usr/local/sbin/ )

2. Copy next content inside quota_notify

#!/usr/bin/perl -w
 
# Author <jps@tntmax.com>
#
# This script assumes that virtual_mailbox_base in defined
# in postfix's main.cf file. This directory is assumed to contain
# directories which themselves contain your virtual user's maildirs.
# For example:
#
# -----------/
#            |
#            |
#    home/vmail/domains/
#        |          |
#        |          |
#  example.com/  foo.com/
#                   |
#                   |
#           -----------------
#           |       |       |
#           |       |       |
#         user1/   user2/  user3/
#                           |
#                           |
#                        maildirsize
#
 
use strict;
 
my $POSTFIX_CF = "/etc/postfix/main.cf";
my $MAILPROG = "/usr/sbin/sendmail -t";
my $WARNPERCENT = 80;
my @POSTMASTERS = ('postmaster@mydomain.tld');
my $CONAME = 'Company ....';
my $COADDR = 'postmaster@mydomain.tld';
my $SUADDR = 'postmaster@mydomain.tld';
my $MAIL_REPORT = 1;
my $MAIL_WARNING = 1;
 
#get virtual mailbox base from postfix config
open(PCF, "< $POSTFIX_CF") or die $!;
my $mboxBase;
while (<PCF>) {
   next unless /virtual_mailbox_base\s*=\s*(.*)\s*/;
   $mboxBase = $1;
}
close(PCF);
 
#assume one level of subdirectories for domain names
my @domains;
opendir(DIR, $mboxBase) or die $!;
while (defined(my $name = readdir(DIR))) {
   next if $name =~ /^\.\.?$/;        #skip '.' and '..'
   next unless (-d "$mboxBase/$name");
   push(@domains, $name);
}
closedir(DIR);
#iterate through domains for username/maildirsize files
my @users;
chdir($mboxBase);
foreach my $domain (@domains) {
        opendir(DIR, $domain) or die $!;
        while (defined(my $name = readdir(DIR))) {
           next if $name =~ /^\.\.?$/;        #skip '.' and '..'
           next unless (-d "$domain/$name");
      push(@users, {"$name\@$domain" => "$mboxBase/$domain/$name"});
        }
}
closedir(DIR);
 
 
#get user quotas and percent used
my (%lusers, $report);
foreach my $href (@users) {
   foreach my $user (keys %$href) {
      my $quotafile = "$href->{$user}/maildirsize";
      next unless (-f $quotafile);
      open(QF, "< $quotafile") or die $!;
      my ($firstln, $quota, $used);
      while (<QF>) {
         my $line = $_;
              if (! $firstln) {
                 $firstln = 1;
                 die "Error: corrupt quotafile $quotafile"
                    unless ($line =~ /^(\d+)S/);
                 $quota = $1;
            last if (! $quota);
            next;
         }
         die "Error: corrupt quotafile $quotafile"
            unless ($line =~ /\s*(-?\d+)/);
         $used += $1;
      }
      close(QF);
      next if (! $used);
      my $percent = int($used / $quota * 100);
      $lusers{$user} = $percent unless not $percent;
   }
}
 
 
#send a report to the postmasters
if ($MAIL_REPORT) {
   open(MAIL, "| $MAILPROG");
   select(MAIL);
   map {print "To: $_\n"} @POSTMASTERS;
   print "From: $COADDR\n";
   print "Subject: Daily Quota Report.\n";
   print "DAILY QUOTA REPORT:\n\n";
   print "----------------------------------------------\n";
   print "| % USAGE |            ACCOUNT NAME          |\n";
   print "----------------------------------------------\n";
   foreach my $luser ( sort { $lusers{$b} <=> $lusers{$a} } keys %lusers ) {
      printf("|   %3d   | %32s |\n", $lusers{$luser}, $luser);
      print "---------------------------------------------\n";
   }
        print "\n--\n";
        print "$CONAME\n";
        close(MAIL);
}
 
#email a warning to people over quota
if ($MAIL_WARNING) {
        foreach my $luser (keys (%lusers)) {
           next unless $lusers{$luser} >= $WARNPERCENT;       # skip those under quota
           open(MAIL, "| $MAILPROG");
           select(MAIL);
           print "To: $luser\n";
      map {print "BCC: $_\n"} @POSTMASTERS;
           print "From: $SUADDR\n";
           print "Subject: WARNING: Your mailbox is $lusers{$luser}% full.\n";
           print "Reply-to: $SUADDR\n";
           print "Your mailbox: $luser is $lusers{$luser}% full.\n\n";
           print "Please consider deleting e-mail and emptying your trash folder to clear some space.\n\n";
           print "Contact <$SUADDR> for further assistance.\n\n";
           print "Thank You.\n\n";
           print "--\n";
           print "$CONAME\n";
           close(MAIL);
        }
}

3. Edit next lines inside and set up your postmaster email address, percentage, etc

my $POSTFIX_CF = "/etc/postfix/main.cf";
my $MAILPROG = "/usr/sbin/sendmail -t";
my $WARNPERCENT = 80;
my @POSTMASTERS = ('postmaster@mydomain.tld');
my $CONAME = 'Company ....';
my $COADDR = 'postmaster@mydomain.tld';
my $SUADDR = 'postmaster@mydomain.tld';
my $MAIL_REPORT = 1;
my $MAIL_WARNING = 1;

4. set chmod 755 on quota_notify (# chmod 755 /usr/local/sbin/quota_notify)

5. add next line to crontab so it will be executed at 0:00 every day.

0 0 * * * /usr/local/sbin/quota_notify &> /dev/null

Keep in mind that this script has only reporting purpose and it will not reject any email when user mailbox is over quota. For this you will need Postfix with quota patch.

This post was inspired by this LINK.

The only difference between a PHP shell script and a regular PHP file which serves web page is the first line:

#!/usr/bin/php -q

The ‘-q’ switch is here to suppress the HTTP headers. After the first line, you just add standard PHP tags:

<?php ?>

Here is the example so you can see what I’m talking about:

#!/usr/bin/php -q
<?php
 
    print("Hi there folks !\n");
 
?>

Save these lines as test.php and execute with:

# php test.php

Good idea is to add the next lines at the beginning:

if (!isset($_SERVER["argv"][0]) || isset($_SERVER['REQUEST_METHOD'])  || isset($_SERVER['REMOTE_ADDR'])) {
	die ("<br><strong>Shell access only</strong>");
}

In this case, this script can be accessible via browser but those lines will kill the script in case if it is issued via browser.

nmap can be used with following command:

# nmap -sS -O 127.0.0.1

The answer will be something like:

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2010-07-08 11:31 CEST
Interesting ports on localhost.localdomain (127.0.0.1):
Not shown: 1663 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
25/tcp   open  smtp
80/tcp   open  http
110/tcp  open  pop3
111/tcp  open  rpcbind
143/tcp  open  imap
993/tcp  open  imaps
995/tcp  open  pop3s
3306/tcp open  mysql
8009/tcp open  ajp13
8080/tcp open  http-proxy
8443/tcp open  https-alt
No exact OS matches for host (If you know what OS is running on it, see http://www.insecure.org/cgi-bin/nmap-submit.cgi).
......
 
Uptime 15.472 days (since Wed Jun 23 00:12:46 2010)
 
Nmap finished: 1 IP address (1 host up) scanned in 9.558 seconds

and nmap can be used to scan remote hosts (keep in mind that many admins will notice this as hack attempt). Simple replace 127.0.0.1 with host IP address.

Another way to check open ports is via netstat. Netstat can show hidden ports and programs associated with ports. Simple execute next command as root:

# netstat -nap

The output list can be very long (depending from your network activity).

Note: Use this tips carefully. I’m not responsible for any potential damage…

The AUTORUN.INF file is a configuration file that is normally located in the root directory of removable media. The malware achieves this by copying a malicious executable in the drive and modifying the AUTORUN.INF file. Windows will open this malicious file silently as soon as the drive is mounted and you probably wouldn’t notice this until you see something strange with your computer. Then it is already to late

Panda USB Vaccine is a free solution designed to protect your computer against this threats. You can disable AutoRun feature on computer and USB drives. This is a very useful tool as there is no easiest way to disable the AutoRun feature.

When ever you insert USB removable drive, you will be asked to vaccinate it.

Part 2

The lines above are made for regular Windows users and here is the hard way to “vaccinate” your removable drives without Panda software.

If you don’t have autorun.inf file on your removable drive, create a blank autorun.inf with your favorite text editor (Notepad or Notepad2 for example). The main idea is to have autorun.inf on your drive, but it should be “damaged” so we won’t be able to delete it (unless you format your drive), edit, rename, etc. I forget to say, that you should leave this file empty (blank).

Its best to make sure the USB key is blank or data backed up before going to next step. Download HEX editor for Windows (for example HxD) and open your USB device in read and write mode (Extras – Open Disk – choose USB drive and remove check box from “Open as Readonly”). Search the disk for the string “autorun” in non-unicode form.

41 55 54 4F 52 55 4E 20 49 4E 46 20
A  U  T  O  R  U  N     I  N  F

All we need to change is the last byte. The current value of the byte is 0×20 has the archive bit set. Change this byte to 0×40, which sets the device bit (which is never normally found on a disk) and save changes.

41 55 54 4F 52 55 4E 20 49 4E 46 40
A  U  T  O  R  U  N     I  N  F  @

To test this operation, try to delete autorun.inf file. You should see the warning pop-up with an error.

I hope you won’t need this instructions but in case you have some problems …

First, keep in mind that running fsck on a mounted file system can result in data corruption so use this commands at your own risk. I’m not responsible for any damage you may cause.

To avoid this, you can:

• Change the running state of the system to single user mode and unmount the file system

(Note: Skip this option if you need to check / part.)

• Boot the computer into Rescue Mode using the installation CD

1) Single user mode

Change the run level to 1 and unmont the file system with (I suppose the /home was affected with problems)

# init 1
# umount /home

Then run fsck with

# fsck /dev/sda2

2) Rescue mode with install CD

Insert the Installation CD into the drive and reboot your system with

# reboot

Wait a while and after booting from the Installation CD type in command prompt:

# linux rescue nomount

Note: nomount directive will skip mounting so you can safely run fsck on your filesystem

Then enter

# fsck -yvf /dev/sda2

where /dev/sda2 is problematic partition.
Note: -yvf means
-y attempt to fix any detected filesystem corruption automatically (answer all questions with “yes”)
-f force a check even if reported in a clean state
-v verbose output, including all file system-specific commands that are executed (you will see all errors and recovery process)

LVM Partitions
Situation with LVM partitions is a little different. To run fsck on lvm partitions first you need to find the pv’s, vg’s, lv’s and then to activate them.

# lvm pvscan
# lvm vgscan
# lvm lvchange -ay VolGroup00
# lvm lvscan
 
# fsck -yfv /dev/VolGroup00/LogVol00

fsck can be scheduled on boot with

# shutdown -Fr now

MySQL Workbench 5.2 RC provides:
1. Data Modeling
2. Query (upgrade from MySQL Query Browser)
3. Admin (upgrade from MySQL Administrator)

Please get your copy from this page

If you already have Eclipse and you want to do develop Android apps, you can manually install ADT as described here.

Useful links:
MotoDev Studio
Eclipse
Installing the SDK

Three years ago, I bought Samsung D900 mobile phone and I must admit that this phone is very good. I was worried about their slider mechanism. After hundreds slides it still works perfectly and I didn’t had any problems with this phone. I still use the original battery,  display works perfectly…. Ops… I forget that camera doesn’t work any more… I don’t know why… The picture is to dark and I can’t see anything.

But… If you want to manage your phonebook, messages or files directly from your computer, you’ll need Samsung PC Studio…. The app is so stupid and buggy that I can’t understand. I tried to use it on more than 5 different computers. Unfort. only once I made it. After first PC Studio update I could say bye-bye to my phone-PC relationship. Only option I had, was to transfer music and images to SD card and then to phone. Sometimes the error was that I can see folders but I can’t delete them, or I can’t upload anything, or the computer simple don’t see phone, or everything works fine but my phone book is unavailable, unreadable, bla bla…

Luckily, bluetooth on the phone works fine so I finally made a phone book backup.

Few days ago, I bought the brand new Samsung i5700 Spica with Android… Fantastic piece of the hardware but to install USB drivers, I should first install “NPS” or in other words New PC Studio…. Oh my dear… This app has completely different approach. Design is so stupid that I’m not sure whats the main purpose. Is this game? Cartoon? Spyware? Some icons flying around, desktop inside desktop, sound which irritates you (yes, some of us don’t like stupid sounds in the middle of the night). Sure, if you’re 11 years old, this can look interesting but…

Of course, the install procedure on Win7 64b wasn’t successful and USB drivers are not installed properly (even when I run them in XP or Vista compatibility mode)…

I know that some of you don’t think like my opinion, but the Samsung developers can be candidate for the worst in the world. Their software designers seems like they came from the past (or future, I’m not sure). All people around me, have the same opinion. All of them had some kind of problems with Samsung PC studio.

In other words, amavisd-new will help you to fight against spam. In this post, I won’t write about installation (coming soon in you theaters)

This post is just a small trick which will help you to release specific message from quarantine (false positive or you simple want to read spam messages)

Fist you need to find message inside the messages log file (usually /var/log/messages)

May 10 10:06:56 ns1 amavis[12774]: (12774-13) Blocked SPAM, [207.46.22.35] [207.46.22.35] <cnfrmpro@microsoft.com> -> <mymail@domain.tld>, quarantine: spam-1lvc624m6MVB.gz, Message-ID: <BY2MSFTVSMTP03Dfn8e0003d305@by2msftvsmtp03.phx.gbl>, mail_id: 1lvc624m6MVB, Hits: 7.743, size: 3013, 4325 ms

As you can see above, it is spam-1lvc624m6MVB.gz

Now you can release specific message with

[root@s1 ~]# amavisd-release spam-1lvc624m6MVB.gz

And you will see something like

250 2.0.0 Ok, id=rel-1lvc624m6MVB, from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as 403206AF07CE

Now you just need to check your inbox and you should see the message.