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How To Patch and Protect Linux Server Against the Glibc GHOST Vulnerability # CVE-2015-0235

A very serious security problem has been found and patched in the GNU C Library called Glibc. It was announced on 27th January 2015. This tutorial explains how to patch Debian, Ubuntu, RHEL, Fedora Linux servers and validate that Linux system no longer vulnerable after patch.

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Running Oracle XE 11gR2 in Nova-Docker container on OpenStack RDO Juno (CentOS 7)

Docker image arahman/docker-oracle-xe-11g:latest  allows to build Nova-Docker
Container on RDO Juno running Oracle XE instance, which may be accessed remotely via floating IP assigned to nova instance. Several network configuration files require tuning with Nova system  instance-name and floating IP assigned from neutron external pool.Complete article may be viewed here


Getting Ready for 2015’s Cloud, Let’s Embrace The Advancements

Getting Ready for 2015’s Cloud, Let’s Embrace The Advancements

As we get ready to embrace the New Year, most enterprises are already preparing themselves with new business strategies for 2015. Technology continues to innovate even if there are ups and downs in businesses. Starting with a new year is always the best time for new goals, aligning strategies, re-assessing and an internal-analysis as well for ensuring improvements.

Most organisations that rely over IT would already know about the cloud models (IaaS, SaaS and PaaS) and have researched on the major services providers. Where most would be looking forward to moving completely to gain success and manage the IaaS layer.

There will be more choices in the cloud for organizations than ever before. The new year would see a shift towards the multi-cloud world where one would advantage of cloud services from different services providers depending upon the workloads. Cloud is not only going to burst into torrent of services that will be delivered at a cheaper cost but would also see an easy in usage. Though this may be a new concept for some ventures, but many have already adopted it where it’s a mix of private and public clouds to suffice IT needs within the businesses. Need for cloud technology is felt by the organizations as it gives a strong boost to analytics and offers agile and flexible environment. “By giving a new approach to IT, it allows the individuals or ventures to select a method to acquire or deliver IT services to the clients with less reliability on restraints of the outdated software and hardware licensing models”, according to David Cearley, vice president and Gartner Fellow.

In addition to countless choices, the emphasis on what drives good value will be the major theme for 2015. Value isn’t specifically referred to cost but the time and energy that is spent on handling and scaling the corporate environment. This will facilitate providers being more skeptical, strengthening the need for a trusted partner whether you depend on that partner for managing public or private cloud, program the DevOps or maintain tabs on your apps like Google Apps for Work. Instead of recruiting resources to manage the tools and technologies and maximizing the cost for them, it will be eminent for the companies to focus on IT management and decide on their partner to generate more value.

As per the global survey by Equinix, around 38 percent of companies plan to install between 3-5 cloud services over next year along with 11 percent planning on more than 10 services. While the report published by the Cloud Industry Forum (CIF) predicted that UK’s cloud penetration will spike up to 90 percent in 2015 introducing new challenges for firms to manage the significant data inflow. Currently, an approximate of 78 percent of UK businesses are using cloud services as per the CIF figures. More users will make a fresh start by moving their server workloads to cloud, where some would upgrade to primary level while others will try to enhance their IT strategy, commented Alex Hilton, the CIF’s chief executive.

Switching over to the cloud environment doesn’t mean simply shifting everything into another company’s container but it’s a template shift in the way you and your company need to work. Since there has been a great change in the system administration, the next step in cloud evolution is the automation of processes that should further make your life easier. But while selecting a cloud service provider you should find out whether it offers all the essentials including good management and automation tools/skills. Elasticity plays a vital role in any venture and one knows that the capability of scaling up and down, decreases the cost when referring to the balance sheet at the end of the year.

Though we are mentioning all the facts and information here, it completely depends upon you, what type of cloud platform to choose – public, private or hybrid. Moving to cloud provides greater agility, reduces complexity, cuts down on overall cost and allows shifting from capital-intensive to operational cost models. The coming year 2015, is going to be a make or break year for many enterprises who take an initiative step towards cloud. So, utilize your holidays to relax and enjoy as the real tough technology wars are to start from next January. Best luck!


Creating your first Linux App with Python and Flask

Whether playing on Linux or working on Linux there is a good chance you have come across a program written in python. Back in college I wish they thought us Python instead of Java like they do today, it’s fun to learn and useful in building practical applications like the yum package manager.

In this tutorial I will take you through how I built a simple application which displays useful information like memory usage per process, CPU percentage etc using python and a micro framework called flask.




Global Cloud Computing Virtualization Market Strategies, Shares & Forecasts 2016

Virtualization of software and servers creates ways to create more effective automated control of business process. The on-demand deployment model depends on the implementation of cloud computing. The ability to deploy virtual application images on any platform at any time has increased significantly. Business software as a service SaaS applications and cloud computing models have matured and adoption has become an issue for every IT department.

Private cloud systems provide security, response time, and service availability. Applications, platforms, and infrastructure are evolving separately. SaaS software as a service application is widely known by the computing model. Platform as a service (PaaS) and infrastructure as a service (IaaS) complement SaaS as compelling aspects of cloud computing and infrastructure services. An organization's application development team and the application portfolio need to be managed as a piecemeal part of the IT infrastructure. It is generally managed on an application by application basis. Applications represent a major source of IT value and are a large IT cost component.

Markets depend on virtualization to make information technology delivery a utility. On demand systems scale to meet the needs of users and users only pay for the capacity they use. Strategies relate to different ways to position software, hardware and services for the most effective product set. The 2010 study has 736 pages, 231 tables and figures.

The popularity of the on-demand deployment model has increased significantly. Systems provide security, response time, and service availability. SaaS software as a service application is widely known by the computing model illustrates. Business applications and computing models have matured and adoption has become an issue for every IT department. Platform as a service (PaaS) and infrastructure as a service (IaaS) have joined SaaS as compelling aspects of cloud computing applications and infrastructure services.

The IBM mainframe has the reliability, scalability, security, large block of memory, shared workload capability, and remote support capability needed in cloud computing. These are called the ity features. IBM mainframe leads enterprise cloud computing. IBM mainframe strategy seeks to permit users to utilize data, applications and services from any device and from any location based on open standards.

The IBM mainframe is able to virtualize new workload. The IFL virtualization provides a stable secure hosting environment for thousands of application images. IBM SOA cloud software is the leading integration system with 72% market share of a rapidly growing systems architecture. The code modules provide a way to make flexible systems that respond to changing market conditions.

Cisco virtualization is delivered through Unified Computing. As a premier networking company, Cisco has designed a compelling architecture that bridges the silos in the data center. A unified architecture uses industry standard technologies. Key to Cisco's approach is the ability to unite compute, network, storage access, and virtualization resources. A single energy efficient system can reduce IT infrastructure costs and complexity. It is used to extend capital assets and improve business agility.

Hewlett Packard High-performance computing (HPC) markets are powered by the adoption of Linux clusters. High-performance computing (HPC) markets are powered by the adoption of Linux clusters. Cluster complexity is rampant hardware parallelism: systems averaging thousands of processors, each of them a multi-core chip whose core count doubles every 18.24 months.

Hardware parallelism trend the additional issues of third-partysoftware costs, weak interconnect performance, the difficulty of scaling many applications beyond a single node, storage and data management, power, cooling, and facility space.

Cluster complexity quickly begins to skyrocket. Hewlett-Packard (HP) has the HPC cluster market share leadership position. Competitive advantage has been achieve principally by working to alleviate cluster complexity through a coordinated strategy of investment and innovation, HPC-centric product planning and design, external partnerships, application expertise and focus.

System integration, sales, and support are part of the HPC cluster solution. HP havs dominated the market by focusing on alleviating this complexity for datacenter administrators and end users. HP's broad product portfolio for HPC also leverages the company's innovations for the mainstream enterprise IT market and advances from HP Labs.

HP has taken a customer-centric, technology-agnostic approach that offers buyers a wide range of technology and product choices. The company has amassed the inhouse domain expertise needed to act as a trusted advisor to HPC users. HP has an innovative approach to the HPC market. The company is positioned to sustain its strong presence. The ability to exploit near-term growth trends depends on continuing to grow out the cluster capability leveraging virtualization.

The major management objectives for this critical area of applications implementation include improving service-oriented architecture (SOA) adoption, increasing Software Development Life Cycle (SDLC) efficiency, improving cost management, and reducing ineffective spending.

Get Sample Copy of Global Cloud Computing Virtualization Market Report @

The fundamental aspect of cloud applications implementation relates to flexibility. The ability to be responsive to changing market conditions is central to the modern IT management task. The desire for systems that support flexibility is anticipated to spur rapid growth of cloud computing. Cloud computing markets at $20.3 billion in 2009 are anticipated to reach $100.4 billion by 2016.


A simple and easy way to install and configure puppet on Linux

Puppet is an automation tool which allows you to automate the configuration of software like apache and nginx across multiple servers.

Puppet installation
In this tutorial we will be installing Puppet in the Puppet/Agent mode.You can install it in a Stand Alone mode as well.

OS & software Versions
Centos 6.5
Linux kernel 2.6.32
Puppet 3.6.2

Let’s get to it then.


How to use GIT to backup your files

Well not exactly Git but a software based on Git known as BUP. I generally use rsync to backup my files and that has worked fine so far. The only problem or drawback is that you cannot restore your files to a particular point in time. Hence, I started looking for an alternative and found BUP a git based software which stores your data in repositories and gives you the option to restore data to a particular point in time.

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End of life / end of support for HP servers


    Can anyone help me how to find the End of life / end of support for HP servers.


Thanks in advance



How to find the exact memory usage of your App on Linux


Linux memory management has always intrigued me. While learning Linux, many concepts are confusing at first, but after a lot of reading, googling, understanding and determination, I learned that the kernel is not only efficient at memory
management but also on par with artificial intelligence in making memory distribution decisions..

This post will hopefully show you how to troubleshoot or at least find out the
amount of memory used by Linux and an application running on it. If you have any
doubts, do let me know by commenting.


5 Awesome Open Source Backup Software For Linux and Unix-like Systems

good backup plan is essential in order to have the ability to recover from, Human errors, RAID or disk failure, File system corruption, Data center destruction and more. In this post I’m going to list amazingly awesome open source Backup software for you.

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How to Fix SSLv3 Vulnerability (POODLE) in Apache and NGINX on CentOS

POODLE (CVE-2014-3566) is an security vulnerability in SSLv3 discovered by Google in September. POODLE stands for Padding Oracle On Downgraded Legacy Encryption. All the websites supporting SSLv3 is vulnerable to POODLE, even if it also supports more recent versions of TLS. Using POODLE a hacker run Man-in-the-middle attacks attacks in your network stream and can steal secure HTTP cookies.

Read complete article here to check how to fix this issue on Apach2(HTTPD)/NGINX Servers on CentOS/RHEL Systems.

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Upcoming Linux Foundation Courses

  1. LFD312 Developing Applications For Linux
    16 Feb » 20 Feb - Atlanta - GA
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