How to Set Up a Complete DevSecOps Pipeline on RHEL 7 DevSecOps integrates security testing directly into every phase of the software delivery lifecycle rather than treating it as a final gate before production. The goal is to detect vulnerabilities, exposed secrets, and misconfigurations early — when they are cheap to fix — and to […]
How to Install Prometheus and Grafana on RHEL 7 Prometheus and Grafana form one of the most popular open-source monitoring stacks available today. Prometheus is a time-series database and scraping engine that collects metrics from instrumented targets, while Grafana provides a rich visualization layer on top of that data. Together they give you real-time dashboards, […]
How to Configure GitLab CI/CD Pipelines on RHEL 7 GitLab CI/CD turns every push to your repository into a fully automated pipeline that can build, test, and deploy your application without manual intervention. The pipeline definition lives in a file called .gitlab-ci.yml at the root of your repository, and the actual work is performed by […]
How to Configure iptables Firewall Rules on RHEL 7 RHEL 7 ships with firewalld as the default firewall management layer, but many system administrators prefer to work directly with iptables, the underlying Linux netfilter framework. iptables provides precise, stateful packet filtering through a chain-based rule system and is the right choice when you need fine-grained […]
How to Install and Configure Traefik Reverse Proxy on RHEL 7 Traefik is a modern, cloud-native reverse proxy and load balancer that differentiates itself from Nginx and HAProxy through its dynamic configuration model — routing rules can be updated at runtime without restarting the proxy. Originally designed for microservices and Docker environments, Traefik works equally […]
How to Install Redis on RHEL 7 Redis is an open-source, in-memory data structure store used as a database, cache, message broker, and streaming engine. Its sub-millisecond response times make it the go-to solution for session caching, real-time leaderboards, pub/sub messaging, and rate limiting in high-performance web applications. On RHEL 7, Redis is available through […]
How to Set Up Tripwire for File Integrity Monitoring on RHEL 7 File Integrity Monitoring (FIM) is the practice of detecting unauthorised changes to critical system files, configuration files, and binaries. When an attacker compromises a system, they often modify files to install backdoors, alter logging behaviour, or escalate privileges. Tripwire creates a cryptographic baseline […]
Prometheus has become the de-facto standard for metrics collection in Linux environments, but it is not the only option. VictoriaMetrics is a high-performance, cost-efficient time-series database that is fully compatible with PromQL, accepts Prometheus remote_write, and offers significant advantages in storage compression, ingestion throughput, and memory usage. A single-node VictoriaMetrics binary can replace or complement […]
How to Configure DRBD for High-Availability Storage on RHEL 7 Distributed Replicated Block Device (DRBD) is a Linux kernel module and set of user-space utilities that provide synchronous block-level replication between two servers over a network. It is often described as a network-based RAID-1 and is widely used as the storage layer in high-availability clusters […]
How to Use Python Virtual Environments on RHEL 7 When you install Python packages system-wide with pip3, every project on the server shares the same set of libraries. This creates an immediate problem: Project A requires Flask 1.1 while Project B requires Flask 2.3, and only one version can occupy the global site-packages directory at […]
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