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Author: Charanjit Cheema

Charanjit is working as Linux Subject Matter Expert in IBM, he has 13 Years of professional experience in IT Infrastructure Projects implementation and support service delivery. Rich work experience in Data Centers​ and MSCs (Mobile Switching Centers). Knowledge in  AWS and Openstack Cloud. He has worked on VMware, RHEV, Red Hat Enterprise Linux 4/5/6/7, Suse Linux Enterprise Server 12, Ubuntu Linux 18.04 LTS, Microsoft Windows Server 2000 / 2003, HP/Dell/IBM Server hardware (Blade and Rack) and midrange Storages: HP MSA/P2000, NetApp, EMC VNXand EVA 4400. He has worked on Backup tools like Symentec Backup exec, Hp Data protector 7. x and Symentec Netbackup. I Have worked on HP BNT, Juniper and Cisco network Switches Brocade SAN Switches and Tape libraries. He possess good knowledge of Project management PMP, Agile and ITIL v3 guidelines. Knowledge of Project SoW, Solution documents and SOP documents designing. Professional qualifications: PMP (Project Management Professional)Training Certification, HP UX 11 i v3 training Certification, RHCE, AWS Certified Solution Architect - Associate and ITIL v3 Certified. Academic qualifications: Bsc in IT and MBA in IT. He is writing a blog from past 3 years as a hobby.

Red Hat Enterprise Linux 8 Beta major features and improvement

Posted on December 10, 2018December 10, 2018 by Charanjit Cheema

Red Hat has launched the beta version of Red Hat Enterprise Linux 8 (RHEL 8) for users and developers for testing purpose and getting feedback from them. Red Hat Inc. which is developing RHEL 8 has announced this operating system beta version for public use on November 14, 2018. Four year ago when Red Hat…

8,067 total views, 2 views today

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Segmentation Fault error in Linux / Unix system

Posted on December 6, 2018December 6, 2018 by Charanjit Cheema

You were running a program installed in your Linux/Unix system and suddenly that program get stop and it log error in its logs memory segmentation fault error or you might executing a command in Linux / Unix server say you are working on LVM extension or VG scanning but you are unable to do so…

19,493 total views, 1 views today

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Red Hat OpenShift Online a Next generation Public Cloud PaaS.

Posted on November 30, 2018November 30, 2018 by Charanjit Cheema

By Launching of Red Hat OpenShift online in year 2011 Red Hat has revolutionize the Cloud platform as a service (PaaS) products since then. Red Hat OpenShift Online or RHOO gives platform to develop cloud-native application on PaaS to developers. It has hosted more than three million applications built by hundreds of thousands of individual…

6,326 total views, 2 views today

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Terraform – A new way of provisioning and managing Datacenter Infrastructure.

Posted on November 17, 2018December 6, 2018 by Charanjit Cheema

Terraform has become hot topic now days. In few years this tool has gain its popularity worldwide, many have adopted it as it has proven good progress which made this tool one of an essential tool of DevOps tool chain. Have a look the Google trend you will get picture how much popularity it has…

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I have applied updates in my Ubuntu Linux machine how do I check what updates are applied?

Posted on October 1, 2018October 1, 2018 by Charanjit Cheema

Whenever you apply an install/update/remove any package or packages Ubuntu log the changes happened to packages in its default file /var/log/dpkg.log. If you do listing to /var/log/ path (below is the command) you may find numbers of uncompressed and compressed dpkg.log files it depends on what type of log rotate policy is configure in file…

6,847 total views, 2 views today

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Infrastructure as a Code a new face of Datacenter infrastructure management and provision.

Posted on September 24, 2018September 24, 2018 by Charanjit Cheema

Earlier in Datacenter Infrastructure were manage and provision through traditional way of physical hardware configuration or interactive configuration tool but now Infrastructure as a code has changed the picture of managing and provisioning the Infrastructure. Infrastructure as a code or IaC is the process of managing and provisioning computer data centers through machine-readable definition files….

6,208 total views, 1 views today

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Simple way to configure Ngnix High Availability Web Server with Pacemaker and Corosync on CentOS7

Posted on September 4, 2018October 1, 2018 by Charanjit Cheema

Pacemaker is an open source cluster manager software which provide high availability of resources or services in CentOS 7 or RHEL 7 Linux. It has feature of scalable and advanced HA Cluster Manager. This HA cluster manager distributed by ClusterLabs. Corosync is the core of Pacemaker Cluster Manager as it is responsible for generating heartbeat…

42,622 total views, 48 views today

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How to recover “rpmdb open failed” error in RHEL or Centos Linux

Posted on August 30, 2018January 26, 2020 by Charanjit Cheema

You are updating the system through yum command and suddenly power goes down or what happen if yum process is accidentally killed. Post this situation when you tried to update the system again with yum command now you are getting below error message related to rpmdb: error: rpmdb: BDB0113 Thread/process 2196/139984719730496 failed: BDB1507 Thread died…

37,847 total views, 8 views today

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Docker and Containers New Buzzwords.

Posted on June 7, 2018June 7, 2018 by Charanjit Cheema

Docker is a container management service. The Docker keyword coined in DevOps for develop, ship and run anywhere why it is so because it enable the developers to easily develop the applications, ship the application into containers and later it can be deployed anywhere. The Docker was released in March 2013 but has become buzzword…

7,414 total views, 1 views today

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What is Cloud Object Storage?

Posted on May 25, 2018May 25, 2018 by Charanjit Cheema

Cloud object storage stores unstructured data(like application images or media files) in the cloud.  Object storage is elastic, flexible and easily scalable into multiple petabytes which ideal for environment where data growth is unlimited hence it is considered a good fit for the cloud. Contrary to Block Storage which deal data as block and logical…

7,727 total views, 2 views today

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