Engineering and technology

Setup mail server on ubuntu 14.04 ( Postfix – dovecot )

This tutorial explains how to setup mail server on ubuntu 14.04 using postfix,dovecot and squirrelmail.
» Postfix ( for sending )
» Dovecot ( for receiving )
» Squirrelmail ( for webmail access ).
Here i have used mail.krizna.com for hostname and krizna.com for Domain . please replace with your domain

Source: Setup mail server on ubuntu 14.04 ( Postfix – dovecot )

How To Install Linux, Apache, MySQL, PHP (LAMP) stack on Ubuntu 14.04 | DigitalOcean

One of the most common steps to take when setting up a new server is to install a LAMP stack. LAMP stands for Linux, Apache, MySQL, and PHP. These individual components, when used together, allow us to host dynamic web content like websites and web ap

Source: How To Install Linux, Apache, MySQL, PHP (LAMP) stack on Ubuntu 14.04 | DigitalOcean

PHP: random_bytes – Manual

(PHP 7)

random_bytesGenerates cryptographically secure pseudo-random bytes

Description

string random_bytes ( int $length )

Generates an arbitrary length string of cryptographic random bytes that are suitable for cryptographic use, such as when generating salts, keys or initialization vectors.

The sources of randomness used for this function are as follows:

  • On Windows, » CryptGenRandom() will always be used.
  • On Linux, the » getrandom(2) syscall will be used if available.
  • On other platforms, /dev/urandom will be used.
  • If none of the aforementioned sources are available, then an Exception will be thrown.

Source: PHP: random_bytes – Manual