Category: Uncategorized

PHP script to monitor exim mail queue

August 26, 2019

by ServerOk with No Comment Uncategorized

When you run exim mail server, it is good to keep an eye on number of emails in mail queue. here is a PHP script that will check number of emails in queue, if it exceed pre-set number, it will email you.

Create file

mkdir /usr/serverok/
vi /usr/serverok/mail_q_monitor.php

1 2	mkdir /usr/serverok/ vi /usr/serverok/mail_q_monitor.php

Add following content.

<?php
# Author: ServerOk Software
# Email: admin@serverok.in
# Web: https://serverok.in

$cmd =  '/usr/sbin/exim -bpc';
$num_mails = exec($cmd);
$adminEmail = "you@your-domain.com";
$alertOn = 100;

if ($num_mails > $alertOn) {
    $hostname = exec('/bin/hostname');
    $subject = 'Mail queue alert on ' . $hostname;
    $mail_text = 'Mail queue on server ' . $hostname . ' have ' . $num_mails . ' mails';
    mail($adminEmail, $subject, $mail_text);
}

<?php

# Author: ServerOk Software

# Email: [email protected]

# Web: https://serverok.in

$cmd = '/usr/sbin/exim -bpc';

$num_mails = exec($cmd);

$adminEmail = "[email protected]";

$alertOn = 100;

if ($num_mails > $alertOn) {

$hostname = exec('/bin/hostname');

$subject = 'Mail queue alert on ' . $hostname;

$mail_text = 'Mail queue on server ' . $hostname . ' have ' . $num_mails . ' mails';

mail($adminEmail, $subject, $mail_text);

}

In this case, if mails in queue exceeded 100, you get email.

$alertOn = 100;

1	$alertOn = 100;

You can change 100 to whatever number you need.

$adminEmail = "you@your-domain.com";

1	$adminEmail = "[email protected]";

Replace [email protected] with your email address.

Set script to run every 10 minutes using cronjob

*/10 * * * * /usr/local/bin/php /usr/serverok/mail_q_monitor.php >/dev/null 2>&1

1	/10 * * * /usr/local/bin/php /usr/serverok/mail_q_monitor.php >/dev/null 2>&1

Install SSL on Centova Cast

November 22, 2018

by ServerOk with No Comment Uncategorized

Edit file

vi /usr/local/centovacast/etc/cc-panel.conf

1	vi /usr/local/centovacast/etc/cc-panel.conf

Find

listen 2199 default ssl;

1	listen 2199 default ssl;

Add below

listen 443 ssl;
listen 80;

1 2	listen 443 ssl; listen 80;

Restart Centova Cast

/usr/local/centovacast/centovacast restart

1	/usr/local/centovacast/centovacast restart

At this point, you will be able to access Centova Cast on port 80 at

http://YOUR_SERVER_IP/login/index.php

1	http://YOUR_SERVER_IP/login/index.php

To install LetsEncrypt Free SSL certificate, run

/usr/local/centovacast/sbin/setssl letsencrypt YOUR-DOMAIN.EXTN

1	/usr/local/centovacast/sbin/setssl letsencrypt YOUR-DOMAIN.EXTN

Restart Centova Cast

/usr/local/centovacast/centovacast restart

1	/usr/local/centovacast/centovacast restart

Now you will be able to access Centova Cast using HTTPS.

VestaCP Installer Compromised

October 21, 2018

by ServerOk with No Comment Uncategorized

VestaCP Free Hosting control panel compromised again. Hackers where able to get access to VestaCP infrastcuture server, allowing them to modify installation script, so it sent root password of servers to hacker.

Here is post from VestaCP on their forum

I’m sorry about inactivity in this post from our side. It was a complex issue and we were not sure we understand the whole picture. Leak in the installer is just one piece of the puzzle. All pieces together lead to cumulative effect.

The issue number one

Our infrastructure server was hacked. Presumably using API bug in the release 0.9.8-20. The hackers then changed all installation scripts to log admin password and ip as addition to the distro name we used to collect stats.

Please check if your server IP here

http://vestacp.com/test/?ip=127.0.0.1

If it’s there you should change admin passwords as soon as possible. Also please make sure there is no /usr/bin/dhcprenew binary installed on your server. This binary is some sort of trojan that is able to launch remote DDoS attack or open shell to your server

For more information, see

https://forum.vestacp.com/viewtopic.php?f=10&t=17641&start=180#p73907

Change PHP version for a site in Plesk Command line

October 4, 2018

by ServerOk with No Comment Uncategorized

To change PHP version for a site, first find available PHP handlers, this can be done with command

/usr/local/psa/admin/bin/php_handlers_control --list

1	/usr/local/psa/admin/bin/php_handlers_control --list

You need to find the id for the PHP handler. For PHP 5.6 fpm, it is “plesk-php56-fpm”.

To change a sites PHP version to PHP 5.6, run

plesk bin domain -u DOMAIN_NAME_HERE -php_handler_id plesk-php56-fpm

1	plesk bin domain -u DOMAIN_NAME_HERE -php_handler_id plesk-php56-fpm

Example

error: ‘x264_bit_depth’ undeclared (first use in this function)

August 14, 2018

by ServerOk with No Comment Uncategorized

When installing ffmpeg, i get error

CC	libavcodec/libvorbisenc.o
CC	libavcodec/libx264.o
libavcodec/libx264.c: In function ‘X264_frame’:
libavcodec/libx264.c:282:9: error: ‘x264_bit_depth’ undeclared (first use in this function)
     if (x264_bit_depth > 8)
         ^
libavcodec/libx264.c:282:9: note: each undeclared identifier is reported only once for each function it appears in
libavcodec/libx264.c: In function ‘X264_init_static’:
libavcodec/libx264.c:892:9: error: ‘x264_bit_depth’ undeclared (first use in this function)
     if (x264_bit_depth == 8)
         ^
make: *** [libavcodec/libx264.o] Error 1

CC libavcodec/libvorbisenc.o

CC libavcodec/libx264.o

libavcodec/libx264.c: In function ‘X264_frame’:

libavcodec/libx264.c:282:9: error: ‘x264_bit_depth’ undeclared (first use in this function)

if (x264_bit_depth > 8)

libavcodec/libx264.c:282:9: note: each undeclared identifier is reported only once for each function it appears in

libavcodec/libx264.c: In function ‘X264_init_static’:

libavcodec/libx264.c:892:9: error: ‘x264_bit_depth’ undeclared (first use in this function)

if (x264_bit_depth == 8)

make: *** [libavcodec/libx264.o] Error 1

This is due to incompatability with ffmpeg and x264.

What you can do is try another version of x264. You will be able to download older version of x264 from

ftp://ftp.videolan.org/pub/x264/snapshots

On 2018-08-14, it failed with latest stable snapshot. So i tried 14 days old stable snapshot

cd /usr/local/src/
wget ftp://ftp.videolan.org/pub/x264/snapshots/x264-snapshot-20180730-2245-stable.tar.bz2
tar xvf x264-snapshot-20180730-2245-stable.tar.bz2
cd /usr/local/src/x264-snapshot-20180730-2245-stable
make clean && make distclean
./configure --prefix=/usr --enable-shared
make && make install
ldconfig

cd /usr/local/src/

wget ftp://ftp.videolan.org/pub/x264/snapshots/x264-snapshot-20180730-2245-stable.tar.bz2

tar xvf x264-snapshot-20180730-2245-stable.tar.bz2

cd /usr/local/src/x264-snapshot-20180730-2245-stable

make clean && make distclean

./configure --prefix=/usr --enable-shared

make && make install

ldconfig

This worked with ffmpeg.

Solution here is to try latet version first, if it did not work, try older version, say try 1 month old version, if that did not work, go back 2 months, see if that works.

Now install ffmpeg with

cd /usr/local/src/
wget https://github.com/FFmpeg/FFmpeg/archive/n3.3.5.tar.gz
tar zxf n3.3.5.tar.gz
cd /usr/local/src/FFmpeg-n3.3.5/
ldconfig
make clean && make distclean
./configure --prefix=/usr --enable-shared --enable-libxvid --enable-libvorbis --enable-libtheora --enable-libmp3lame --enable-gpl --enable-libfdk-aac --enable-nonfree --enable-libx264 --enable-libfreetype
make && make install && ldconfig

cd /usr/local/src/

wget https://github.com/FFmpeg/FFmpeg/archive/n3.3.5.tar.gz

tar zxf n3.3.5.tar.gz

cd /usr/local/src/FFmpeg-n3.3.5/

ldconfig

make clean && make distclean

./configure --prefix=/usr --enable-shared --enable-libxvid --enable-libvorbis --enable-libtheora --enable-libmp3lame --enable-gpl --enable-libfdk-aac --enable-nonfree --enable-libx264 --enable-libfreetype

make && make install && ldconfig

Enable Zend OPcache in PHP

December 10, 2017

by ServerOk with No Comment Uncategorized

To enable Zend OPCache in PHP, edit php.ini add following to end of the file

zend_extension=opcache.so

1	zend_extension=opcache.so

Now you may need to adjust some settings, in php.ini uncomment following, change values as needed.

opcache.enable=1
opcache.enable_cli=1
opcache.memory_consumption=128
opcache.max_accelerated_files=10000
opcache.validate_timestamps=1
opcache.revalidate_freq=10

opcache.enable=1

opcache.enable_cli=1

opcache.memory_consumption=128

opcache.max_accelerated_files=10000

opcache.validate_timestamps=1

opcache.revalidate_freq=10

Verify it with

[root@vps154294 php]# php -m | grep  Zend
Zend OPcache
[Zend Modules]
Zend OPcache
[root@vps154294 php]#

[root@vps154294 php]# php -m | grep Zend

Zend OPcache

[Zend Modules]

Zend OPcache

[root@vps154294 php]#

Restart web server. If you using php-fpm or fcgi, you need to restart the process.

phpinfo() will show

Install Redis PHP Module from source

December 10, 2017

by ServerOk with No Comment Uncategorized

To install Redis PHP module from source, run

cd /usr/local/src
git clone https://github.com/phpredis/phpredis.git
cd /usr/local/src/phpredis
/usr/serverok/php-7.1.12/bin/phpize
./configure --with-php-config=/usr/serverok/php-7.1.12/bin/php-config
make && make install

cd /usr/local/src

git clone https://github.com/phpredis/phpredis.git

cd /usr/local/src/phpredis

/usr/serverok/php-7.1.12/bin/phpize

./configure --with-php-config=/usr/serverok/php-7.1.12/bin/php-config

make && make install

Once installed, edit your php.ini file, add following below extension_dir line

extension=redis.so

1	extension=redis.so

Verify redis is installed with php -m

[root@vps154294 ~]# /usr/serverok/php-7.1.12/bin/php -m | grep redis
redis
[root@vps154294 ~]#

[root@vps154294 ~]# /usr/serverok/php-7.1.12/bin/php -m | grep redis

redis

[root@vps154294 ~]#

Now restart web server

service httpd restart

1	service httpd restart

phpinfo() will show following

phpinfo redis

ServerOK

Posts in category: Uncategorized

PHP script to monitor exim mail queue

Install SSL on Centova Cast

VestaCP Installer Compromised

Change PHP version for a site in Plesk Command line

error: ‘x264_bit_depth’ undeclared (first use in this function)

Enable Zend OPcache in PHP

Install Redis PHP Module from source