Hands‑on DevOps operations using Docker, K8s, Jenkins, and Ansible—empowering ops professionals to grow together through sharing, discussion, knowledge consolidation, and continuous improvement.
This article presents two Bash scripts that automate MySQL multi‑database backups with per‑table dumps and rotate Nginx access logs daily by moving them into month‑based directories and signaling Nginx to reopen its logs.
This article provides two Bash scripts: one that automatically detects and blocks IP addresses generating excessive requests to an Nginx server using iptables, and another that backs up all non‑system MySQL databases with timestamped filenames, both designed for easy server operation and maintenance.
This article explains why disk space may not be freed after deleting large log files on a Linux server, describes the underlying file system mechanisms, and provides a step‑by‑step troubleshooting guide using /tmp cleanup and the lsof command to identify and kill lingering processes.
This advanced Jenkins course covers pipeline builds, multi-node configuration, plugin development, distributed builds, integration with tools like SonarQube and Artifactory, and continuous deployment, providing practical video tutorials and resources for mastering CI/CD workflows.
This article provides a detailed list of 51 video tutorials covering Oracle database download, installation, basic SQL operations, DML/DQL commands, PL/SQL programming, advanced features, and related database administration topics, offering a complete learning path for Oracle practitioners.
This article explains how to identify a full disk, prepare the environment, partition and format a new disk, update fstab, copy data, and verify the expansion using Linux commands such as fdisk, mkfs.xfs, mount, and du.
This article explains four typical cache problems—penetration, avalanche, breakdown, and distributed cache efficiency—describing their causes and offering practical mitigation strategies such as top‑level filtering, Bloom filters, staggered expirations, null caching, and locking mechanisms.
This course provides a detailed, step‑by‑step curriculum covering Spring Cloud microservice architecture, distributed systems fundamentals, performance optimization, source‑code deep dives, middleware, cloud services, data handling, performance tuning, design patterns, and essential development tools for building high‑performance, scalable backend solutions.
This course provides an in‑depth exploration of the technical challenges faced by Java architects, covering Spring bean lifecycle, AOP, transaction mechanisms, SpringBoot auto‑configuration, JVM memory models, MySQL indexing, Redis caching, microservice patterns, distributed locks, and performance optimization techniques across 99 video modules.
This article provides a comprehensive, step-by-step tutorial on checking, installing, editing, and applying iptables firewall rules on a Linux system, including common port allowances, ICMP handling, rule persistence, and startup configuration using command-line examples.
