Few days back, I created an account at voipfone.co.uk for VOIP service. I chose Asterisk 11 as it is stable and comes with Ubuntu 14.04 LTS. The installation and configuration of voipfone service in Asterisk is relatively easy. Install asterisk apt-get install asterisk All configuration files of asterisk are in /etc/asterisk directory. The important files [...]
A nine year old local privilege escalation vulnerability has been reported in linux kernel. All linux distribution are reportedly affected by this. In redhat/centos 5, 6 and 7, the way to identify the affected or unpatched system is like below. $ wget https://access.redhat.com/sites/default/files/rh-cve-2016-5195_1.sh $ bash rh-cve-2016-5195_1.sh An official version of the patch is not yet [...]
Master/Slave Concept: While hosting a website, the database is of utmost importance as a small glitch in the database can make or break the whole website. Hence, we look for different ways to keep the database secured. One of the common methods used is the MySQL master-slave replication. The Master-slave data replication allows data to [...]
A systemd vulnerability has been reported which freezes systemd calls. Systemd has been widely adopted in latest Linux Distributions like Redhat Enterprise Linux, Ubuntu, Debian, SUSE Linux Enterprise Servers. Systemd is the daemon that manages other daemons in Linux. A zero sized message received in systemd notification socket will hang its pause system call. It [...]
Apache Jmeter is an open source application which is used for monitoring apache web server working and its performance. It is based upon java application with graphical interface and it was developed by Stefavno Mazzocchi of the Apache software foundation. Performance means testing a server or web application against heavy loads, several and simultaneous user [...]
Today, no matter what the purpose, we give utmost care and importance to our precious data. Data loss is a common nightmare for you and me alike. When the loss is of a database for which you’ve spent a good amount of man-hours and resources, it would be heartbreaking. If [...]
Apache subversion is a software versioning and source control system distributed as a libre software under the apache license. Developers use subversion to maintain current and historical versions,archive old versions of files and directories, examine logs of how they have changed over time. Subversion can operate across networks, which allows it to be used by [...]
An Apache Spark is a powerful open source processing engine for Hadoop data. Spark runs on top of an existing Hadoop installation or HDFS(Hadoop Distributed File System). So, before learning with Spark, let us go through some basic concepts in Hadoop. We know that Hadoop helps in storing and processing large set of data in [...]
Openstack is an open source cloud computing platform, which help to create public and private cloud in large and small scale infrastructure. This technology actually delivers some solutions for cloud servers. The code developers in the global community software and some cloud specialists equally collaborated to form a new technology known as Openstack. This project [...]
Is your server overloaded? Is your busy website finding hard to get a response? Load balancing can be one stop solution to avoid such bottlenecks. As the term defines, its all about distributing workloads across multiple resources and no single device is overwhelmed. In the case of servers load balancing is the method of distributing [...]
