August 25, 2015

Compiling and installing new kernel in Redhat Linux

Filed under: Miscellaneous — Bella @ 10:05 pm

In our example, the current kernel version is

Lets now upgrade the kernel to higher version 3.2

1: Installing Kernel  Dependencies

Installing or Compiling Kernel requires following various required packages and up-to-date system packages.

  1. Latest GCCversion
  2. Latest Ncursesdevelopment version
  3. System packages up-to-date

#  yum install gcc ncurses ncurses-devel

# yum update (more…)

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August 16, 2015

Process Status : PS

Filed under: General Topics — Bella @ 9:27 pm

A process is a single program running in its own virtual address space. Using this definition, everything running under Linux is a process. Process is a running instance of a program. Linux is a multitasking operating system, which means that more than one process can be active at once.

PS can show you the running processes on your system in different ways. Several types of processes are involved with the Linux operating system.

Each has its own special features and attributes:

An interactive process is a process initiated from (and controlled by) a shell. Interactive processes may be in foreground or background.

A batch process is a process that is not associated with a terminal but is submitted to a queue to be executed sequentially. (more…)

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July 22, 2015

SSLv3 POODLE vulnerability

Filed under: General Topics,Miscellaneous,Server Security — Bella @ 11:13 pm

The SSLv3 Poodle vulnerability which was released on October 14th 2014, is an attack on the SSL 3.0 protocol and it is completely protocol based vulnerability.

POODLE stands for “Padding Oracle On Downgraded Legacy Encryption”. The padding attack happens when a plain text is converted to ciphertext. The plain text message often has to be expanded to be compatible with the underlying cryptographic structure and the leakage of data mainly occur during the decryption of the cipher text.

The SSLv3 poodle vulnerability allows a man-in-the-middle attacker to decrypt ciphertext using a padding oracle attack. (more…)

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July 16, 2015

CalDAV and CardDAV in cPanel 11.50

Filed under: General Topics,Miscellaneous — Bella @ 11:25 pm

As we are aware, cPanel has introduced the latest stable version cPanel 11.50.

Many new features are implemented in the latest version , which includes but are not limited to :.

  • Support for CentOS 7 on fresh installations
  • Synchronized Calendar & Contacts
  • Greylisting : Protect your server against spam, Greylisting defers email received from new, unknown triplets
  • Passive OS fingerprinting (p0f) : Improved the GeoIP identifier and added operating system and other information to email notifications. This information helps you quickly identify users that trigger events.
  • Changes to new cPanel user system IDs : Changed the possible numbers for new cPanel accounts’ User IDs (UIDs) and Group IDs (GIDs).

In this article, let’s see more about synchronizing Calendar & Contacts using CalDAV and CardDAV. (more…)

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June 24, 2015

CentOS Web panel

Filed under: General Topics,Linux Basics,Technical Articles — Bella @ 9:47 pm

CentOS has introduced a free Web Hosting control panel (CWP : Centos Web Panel) which is designed for easy management of servers including both Dedicated & VPS without the help of ssh console.

During installation procedure, CWP installs full LAMP stack (apache, php, phpmyadmin, webmail, mailserver etc.) on your server.

List of softwares installed and configured during CWP installation are as below:

Apache Web Server
PHP 5.4
MySQL + phpMyAdmin
Postfix + Dovecot + roundcube webmail
CSF Firewall
Backups; AutoFixer for server configuration
Varnish Cache server
suPHP & suExec
Mod Security + OWASP rules
Monitor services eg. top, apache stats, mysql etc.

In this article, let’s have a check with the server requirements and features of CWP in Linux servers. (more…)

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