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…
When speaking about memory there are a few concepts that I had to wrap my head around. I’m hence putting them together for future reference.…
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…
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,…
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…
Update 2023: the practice outlined in this post has been outdated. This post is for archive ony. One of the reasons I prefer CloudFormation over…