First you should check which nameserver is responding for this tld. For example if we wanna check .com domain we need to ask proper nameserver

dig +short com. NS
e.gtld-servers.net.
k.gtld-servers.net.
j.gtld-servers.net.
h.gtld-servers.net.
m.gtld-servers.net.
a.gtld-servers.net.
l.gtld-servers.net.
i.gtld-servers.net.
g.gtld-servers.net.
c.gtld-servers.net.
d.gtld-servers.net.
f.gtld-servers.net.
b.gtld-servers.net.

We can chose some random dns server from them and execute

dig +norec @b.gtld-servers.net. example.com. NS

Then we will get which nameservers on which ip are responding for this domain

Материалът Debugging dns glue records е публикуван за пръв път на rosen4o.net.

AT+CCWA=0,0,1                    #disable call-waiting
AT+CFUN=1,1                      #reset dongle
AT^SYSCFG=13,0,3FFFFFFF,0,3      #modem 2G only, any band, no roaming

Deleting SMS in sim card memory. After deleting messages you should reset modem.

dongle cmd dongle0 AT+CPMS=\"SM\",\"SM\",\"SM\"

dongle cmd dongle0 AT+CMGD=1,4

Deleting SMS in modem memory. After deleting messages you should reset modem.

dongle cmd dongle0 AT+CPMS=\"ME\",\"ME\",\"ME\"

dongle cmd dongle0 AT+CMGD=1,4

Other

dongle ussd dongle0 *123#       - sending ussd 

Enabling call forwarding:

dongle cmd dongle0 AT+CCFC=4,3,“+3591111111″ ( forwarding all calls)

dongle cmd dongle0 AT+CCFC=4,0 (disable forwarding)

Disable call waiting:

dongle cmd dongle01 AT+CCWA=0,0,1

CLIR

dongle cmd dongle01 AT+CLIR=1 (включить сокрытие номера)
dongle cmd dongle01 AT+CLIR=0 (выключить сокрытие номера)

Sending SMS

dongle sms dongle01 1234 MESSAGE

Материалът chan_dongle modem config е публикуван за пръв път на rosen4o.net.

find -type f -exec grep -IlP ‘<\?(?!(php|xml|=))’ {} +

Материалът search for short open tags е публикуван за пръв път на rosen4o.net.

You can use mkvmerge from the packet mkvtoolnix which can easy and fast do the job

Материалът split mp4 file by size on linux е публикуван за пръв път на rosen4o.net.

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at

Then you need to add some lines to your .htaccess file

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /

Header add Access-Control-Allow-Origin „*“
Header add Access-Control-Allow-Headers „origin, x-requested-with, content-type“
Header add Access-Control-Allow-Methods „PUT, GET, POST, DELETE, OPTIONS“

RewriteRule ^index\.php$ – [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

Материалът Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource е публикуван за пръв път на rosen4o.net.

find * -name '*.php' |xargs grep -lirn "eval(base64"

Материалът check for eval(base64 in multiple files е публикуван за пръв път на rosen4o.net.

#!/bin/bash
# renames.sh
# basic file renamer

criteria=$1
re_match=$2
replace=$3

for i in $( ls *$criteria* );
do
src=$i
tgt=$(echo $i | sed -e „s/$re_match/$replace/“)
mv $src $tgt
done

Материалът bash rename file е публикуван за пръв път на rosen4o.net.

create a new file

 vim /usr/local/bin/phpsendmail

place inside it

#!/usr/bin/php
<?php

$sendmail = ‘/usr/sbin/sendmail’;
$logfile = ‘/var/log/mail.form’;

/* Get email content */
$logline = “;
$mail = “;
$fp = fopen(‘php://stdin’, ‘r’);

while ($line = fgets($fp))
{
if(preg_match(‘/^to:/i’, $line) || preg_match(‘/^from:/i’, $line))
{
$logline .= trim($line).’ ‘;
}
$mail .= $line;
}

/* Build sendmail command */
$cmd = ‘echo ‘ . escapeshellarg($mail) . ‘ | ‘.$sendmail.’ -t -i’;
for ($i = 1; $i < $_SERVER[‘argc’]; $i++)
{
$cmd .= escapeshellarg($_SERVER[‘argv’][$i]).’ ‘;
}

/* Log line */
$path = isset($_ENV[‘PWD’]) ? $_ENV[‘PWD’] : $_SERVER[‘PWD’];
file_put_contents($logfile, date(‘Y-m-d H:i:s’) . ‘ ‘ . $logline .’  ==> ‘ .$path.“\n“, FILE_APPEND);

/* Call sendmail */
return shell_exec($cmd);
?>

Then you need to make it executable

chmod +x /usr/local/bin/phpsendmail

touch /var/log/mail.form

chmod a+w /var/log/mail.form

In your php.ini file you need to add

sendmail_path = /usr/local/bin/phpsendmail

Restart apache

This will cause all emails which are send from apache to be logged in the file /var/log/mail.form

Материалът catch spam from apache е публикуван за пръв път на rosen4o.net.

vim ~/.my.cnf

and change on the row

pass=

to

password=

Материалът mysql Warning: Using unique option prefix pass instead of password is deprecated and will be removed in a future release. Please use the full name instead. е публикуван за пръв път на rosen4o.net.

Among others, Google Gmail and Yahoo mail check your email for a DKIM signature.
Install and Configure OpenDKIM

1. Install OpenDKIM

apt-get install opendkim

Comment: This will install the latest available stable Debian packaged version of OpenDKIM which is currently 2.0.1. This version is already a couple of years old (2010).
If you know how/want to compile sources yourself, then the latest version is 2.4.3 (and 2.5.0 is right around the corner)

2. Edit the OpenDKIM config file

vim /etc/opendkim.conf

Add these rows:

KeyTable /etc/opendkim/KeyTable
SigningTable /etc/opendkim/SigningTable
ExternalIgnoreList /etc/opendkim/TrustedHosts
InternalHosts /etc/opendkim/TrustedHosts

Note: If you run multiple instances of Postfix you need to add this to the opendkim.conf for each instance (or the ones you want to use opendkim)

3. Edit /etc/opendkim/TrustedHosts

mkdir -p /etc/opendkim/
vim /etc/opendkim/TrustedHosts

Add domains, hostnames and/or ip’s that should be handled by OpenDKIM. Don’t forget localhost.

127.0.0.1
localhost

4. Edit /etc/default/opendkim

vim /etc/default/opendkim

Uncomment this row:

SOCKET=“inet:12345@localhost“ # listen on loopback on port 12345

Generate keys
Repeat these steps to generate keys for each domain you will send email from. Replace mydomain.com with your domain name in examples below.

1. Generate key

mkdir -p /etc/opendkim/keys/mydomain.com
cd /etc/opendkim/keys/mydomain.com
opendkim-genkey -r -d mydomain.com
chown opendkim:opendkim default.private

2. Add domain to KeyTable /etc/opendkim/KeyTable

vim /etc/opendkim/KeyTable

Add line

default._domainkey.mydomain.com mydomain.com:default:/etc/opendkim/keys/mydomain.com/default.private

3. Add domain to SigningTable /etc/opendkim/SigningTable

vim /etc/opendkim/SigningTable

Add line:

mydomain.com default._domainkey.mydomain.com

Note that in OpenDKIM 2.0.1 domain names are case sensitive (supposed to be fixed from 2.3.1 but I have not tested).
This means that in the above example an email from info@mydomain.com will be signed, but an email from info@MyDomain.com will not be signed. The workaround is to add one extra entry for MyDomain.com to SigningTable.

4. Add to DKIM public key to DNS

Add an entry for the public key to the DNS server you are using for your domain. You find the public key here:

cat /etc/opendkim/keys/mydomain.com/default.txt

And insert it in your zone file
Start OpenDKIM

/etc/init.d/opendkim start

In the future, if you make any changes to configuration remember to restart: /etc/init.d/opendkim restart
Configure and Restart Postifx

1. Configure Postfix

vim /etc/postfix/main.cf

Add or edit these lines:

milter_default_action = accept
milter_protocol = 6
smtpd_milters = inet:localhost:12345
non_smtpd_milters = inet:localhost:12345

2. Restart Postfix

/etc/init.d/postfix reload

Log files are in the /var/log directory

cat /var/log/mail.log
cat /var/log/mail.warn
cat /var/log/mail.err

Log more info

vim /etc/opendkim.conf

Add this line:

LogWhy yes

Credits

Guides that have helped me along the way: Debian Tutorials and Syslog

Материалът dkim on debian with postfix е публикуван за пръв път на rosen4o.net.