Introduction Setting up set up galera cluster for mariadb on centos stream 9 on a CentOS Stream 9 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Set Up Galera Cluster for MariaDB on CentOS Stream 9, with all the commands you need, the SELinux […]
How to Install and Configure Postfix Mail Server on RHEL 7 Postfix is a high-performance, security-focused Mail Transfer Agent (MTA) that is installed by default on many RHEL 7 systems. It handles the sending, receiving, and routing of email using the SMTP protocol. Whether you are setting up a server to send application alerts, relay […]
Introduction IBM AIX 7.1 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.1 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to configure chef client on ibm aix 7.1 on IBM […]
Introduction This tutorial covers How to Set Up Galera Cluster for MariaDB on SLES 12 on SLES 12. SLES 12 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Prerequisites Ensure your SLES 12 system is up to […]
Introduction IBM AIX 7.2 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.2 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to tune asynchronous i/o on ibm aix 7.2 on IBM […]
How to Configure Kerberos Authentication on RHEL 7 Kerberos is a network authentication protocol that uses symmetric-key cryptography to allow clients and servers to prove their identity to each other securely without transmitting passwords over the network. It is the backbone of authentication in Active Directory environments and is natively supported across Linux through MIT […]
How to Configure Database Connection Pooling with PgBouncer on RHEL 7 Every PostgreSQL client connection spawns a backend process on the server, consuming approximately 5–10 MB of RAM for its working memory and adding overhead to the process scheduler. Applications that open hundreds of short-lived connections — such as PHP scripts, Node.js workers, or microservices […]
How to Configure Windows Server 2019 Container Security Securing Windows containers on Windows Server 2019 involves hardening the container runtime, securing container images, isolating workloads, controlling network access, and monitoring for anomalous behavior. The default Docker installation is functional but not hardened for production use. This guide covers the key security controls available for Windows […]
Docker Compose simplifies running multi-container applications by defining every service, network, and volume in a single docker-compose.yml file. Instead of typing long docker run commands for each container, you declare the desired state and let Compose handle the orchestration. On RHEL 8 with Docker CE installed, Docker Compose V2 ships as a plugin and is […]
How to Use Docker Volumes and Bind Mounts on RHEL 7 Containers are ephemeral by design — when a container is removed, any data written inside its writable layer is lost. Docker solves this with three types of persistent storage: named volumes, bind mounts, and tmpfs mounts. Named volumes are managed entirely by Docker and […]
