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  • Lightsail – create a WordPress site in one hour

    My challenge with my just revived wordpress.com site is the plug-ins. Even paid premium users cannot install plug-ins for diagram, etc. I don’t want to…

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  • Storage Nitty-Gritty 1 of 5 – Disk and RAID

    On my trip I have been through several pre-sales discussions on storage. Therefore I’m taking this opportunities to write up a series of postings deep…

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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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