Configuring Secure etcd with SSL/TLS on RHEL 8 / CentOS 8: A Step-by-Step Guide
Learn how to configure etcd with SSL/TLS on RHEL 8 or CentOS 8 for secure communication. This step-by-step guide covers everything from generating certificates to setting up a multi-node etcd cluster. Table of Contents Introduction In today’s world of cloud-native architectures and containerized applications, securing your etcd cluster is paramount. Etcd is a distributed key-value […]
How to Configure LVM on Multipath Devices in RHEL
Learn how to configure LVM on multipath devices in RHEL with this comprehensive step-by-step guide. Improve storage performance, ensure high availability, and master enterprise-level disk management using MPIO and LVM. Table of Contents 🔈Introduction When building enterprise-level storage systems, logical volume management (LVM) combined with multipath I/O (MPIO) ensures robust redundancy, scalability, and high availability. Red Hat Enterprise […]
Install CentOS Stream 10 Server with GUI in 12 Easy Steps
Learn how to install CentOS Stream 10 Server with GUI in just 12 easy steps. This guide provides clear instructions, CLI examples, and tips for configuring a CentOS Stream server with a graphical user interface. Table of Contents 🔈Introduction CentOS Stream is an exciting variant of CentOS Linux, offering a rolling-release model, making it a […]
How to Monitor SSL Certificate Expiry with Zabbix
Learn how to monitor SSL certificate expiry using Zabbix with automated scripts and triggers. Avoid service disruptions by setting up alerts for expiring certificates. Table of Contents 🔈Introduction In today’s secure-by-default internet, SSL/TLS certificates are essential for encrypting web traffic and building user trust. However, managing and renewing these certificates across multiple servers or domains can be […]
Automate Certificate Renewal and Deployment Using OpenSSL and Bash
Learn how to automate SSL/TLS certificate renewal and deployment using OpenSSL and Bash scripts. Includes CLI examples, best practices, cron automation, and deployment tips. Table of Contents Introduction Securing communication channels using SSL/TLS certificates is critical in today’s cybersecurity landscape. However, managing and renewing these certificates manually is time-consuming and error-prone—especially in environments with dozens […]
How to Archive and Extract PFX Certificate Files
Learn how to archive and extract PFX/PKCS#12 certificate files using OpenSSL and Windows tools. Includes CLI examples, tables, and best practices for secure handling. Table of Contents 🔈Introduction Whether you’re managing a secure web server, configuring enterprise authentication, or migrating SSL certificates across systems, understanding how to work with PFX certificate files (also known as […]
Understanding DNF History: Tracking Package Installations and Removals
Understanding dnf history for tracking, auditing, and undoing package installs and removals on Fedora/RHEL. CLI examples, tables, best practices included. Table of Contents 🔈Introduction In the world of Red Hat–based Linux distributions (Fedora, RHEL, CentOS Stream, AlmaLinux, Rocky Linux), dnf is the go‑to package manager. As system administrators and DevOps engineers, visibility into package installations and removals is crucial. […]
PostgreSQL Containerization Best Practices
Learn PostgreSQL containerization best practices—including secure images, persistent volumes, resource tuning, backups, monitoring & seamless upgrades—for reliable cloud-native deployments. Table of Contents 🔈Introduction Containerizing PostgreSQL has revolutionized how developers, DevOps engineers, and sysadmins deploy and manage relational databases. With Docker and Kubernetes driving cloud-native infrastructure, following best practices in PostgreSQL containerization ensures scalability, maintainability, and […]
How to Create and Build Your Own RPM Packages
Learn how to create and build RPM packages for Linux-based systems. This guide covers setting up your RPM build environment, writing spec files, and building and testing RPM packages step-by-step. Table of Contents 🔈Introduction In the world of Linux-based systems, the ability to create and manage software packages is a fundamental skill for developers and […]
Deploy PostgreSQL Database on Podman: A Step-by-Step Guide
Learn how to deploy PostgreSQL database on Podman with this step-by-step guide. From installation to database setup, find out everything you need to know to run PostgreSQL containers efficiently. Table of Contents 🔈Introduction In the world of modern application development and containerization, Podman has gained significant traction as a container management tool. It’s known for being a […]