fuadarradhi

<?php
/**
 * simple method to encrypt or decrypt a plain text string
 * initialization vector(IV) has to be the same when encrypting and decrypting
 * 
 * @param string $action: can be 'encrypt' or 'decrypt'
 * @param string $string: string to encrypt or decrypt
 *
 * @return string
 */

fuadarradhi

You can run these commands to encrypt or decrypt a string:

Command

To encrypt:

printf "Lorem ipsum dolor sit amet, ..." | \
  openssl enc -e -base64 -A -aes-256-cbc -pass pass:"my-password"

To decrypt:

fuadarradhi

Allow apache to execute an external program through SELinux

This is helpful when you don't want to disable SELinux but do want to allow apache to execute an external program. For example wkhtmltopdf. Run the following commands from the terminal. (This has been tested in CentOS 7.)

Allow Exicution

setsebool httpd_execmem on

Change a dirs security context if the program writes to a file

fuadarradhi

1. Go to Sublime Text to: Tools -> Build System -> New Build System 
and put the next lines:

{
    "cmd": ["python3", "-u", "$file"],
    "file_regex": "^[ ]File \"(...?)\", line ([0-9]*)",
    "selector": "source.python"
}

Then save it with a meaningful name like: python3.sublime-build

fuadarradhi

#Install Predawn and Agila themes first

{
	"bold_folder_labels": true,
	"caret_extra_width": 2,
	"caret_style": "smooth",
	"color_scheme": "Packages/Predawn/predawn.tmTheme",
	"fade_fold_buttons": false,
	"font_face": "Inconsolata",
	"font_size": 12,

fuadarradhi

.bottom-panel {
  /* .window-button-icon height +
     .window-button vertical padding +
     .window-button > StWidget vertical padding) */
  height: 2.25em;
}

.window-list {
  spacing: 2px;
  font-size: 10pt;

fuadarradhi

# -*- coding: utf-8 -*-

import Image

def resize_and_crop(img_path, modified_path, size, crop_type='top'):
    """
    Resize and crop an image to fit the specified size.

    args:
        img_path: path for the image to resize.

fuadarradhi

input
{
    file
    {
        path => ["/home/logstash/crawler/*.json"]
        start_position => "beginning"
        sincedb_path => "/dev/null"
        exclude => "*.gz"
    }

fuadarradhi

Install packages

yum install ppp iptables
rpm -Uvh http://poptop.sourceforge.net/yum/stable/rhel6/pptp-release-current.noarch.rpm
yum install pptpd

Route config

fuadarradhi

Moved to git repository: https://github.com/denji/nginx-tuning

NGINX Tuning For Best Performance

For this configuration you can use web server you like, i decided, because i work mostly with it to use nginx.

Generally, properly configured nginx can handle up to 400K to 500K requests per second (clustered), most what i saw is 50K to 80K (non-clustered) requests per second and 30% CPU load, course, this was 2 x Intel Xeon with HyperThreading enabled, but it can work without problem on slower machines.

You must understand that this config is used in testing environment and not in production so you will need to find a way to implement most of those features best possible for your servers.