Journey of an IT Architect

  • Package Repository Management for Linux

    RPM is the package manager tool in Linux. YUM is a repository management tool to fetch appropriate package for the particular version of Linux. YUM…

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  • Interesting terms and principles

    It is enlightening to find out that several things that I struggled at different times in professional life are actually experienced by many predecessors. Some…

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  • Java version confusions

    Anyone working with deploying Java applications inevitably came across one of these confusions with the terms. Let’s clarify them. This clarification is not for Java…

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  • Redhat Firewall configuration: from iptables to firewalld

    Tools to manage firewall Packet filter rules in Linux Kernel is managed by an user-space application named iptables in CentOS and RedHat. Since CentOS 7,…

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  • Log shipping through ELK

    A common devops task is build logging pipeline with ELK stack (Elasticsearch, Logstash, Kibana). Suppose the application is written in Java and currently use log4j’s…

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  • A review of vSphere virtualization technologies

    This post is a summary of VMware’s white paper Introduction to VMware vSphere. ESXi is the hypervisor (virtualization layer) on bare metal servers that abstracts…

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