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  • Git Explained 1 of 2

    In a nutshell, Git is a distributed version control system, commonly used as source control management. It places files in one of three logical areas…

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  • 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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  • 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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  • Linux Admin Basics 3 of 3 – text processing, regex, sed & awk

    Most of the text processing can be processed by awk and sed. Sed is non-interactive stream editor that allows you to specify all editing instructions…

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