🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: Red Hat Enterprise Linux 9 📖 ~4 min read • Source: Red Hat advisory RHSA RHSA-2026:6499 Related CVEs: CVE-2023-40403 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative […]
🟡 Medium ⏱ 5–30 min Last verified: 9 June 2023 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & Cross-Refs References & Further […]
Without a log rotation strategy, application log files will grow unbounded until they fill your disk and bring services down. Logrotate is the standard RHEL utility that automates log file rotation, compression, and cleanup on a scheduled basis with no daemon process required. It runs daily via a cron job and processes configuration rules you […]
Grafana Loki is a horizontally scalable, highly available log aggregation system designed to be cost-effective by indexing only metadata labels rather than full log content. Promtail is its companion agent that tails log files and ships them to Loki. Compared to the ELK stack, Loki is significantly lighter on resources, making it an excellent choice […]
Jenkins Pipeline (formerly Workflow) allows defining the entire CI/CD build, test, and deploy process as code in a Jenkinsfile committed to the source repository alongside the application code. This “Pipeline as Code” approach means the build process is version-controlled, reviewable via pull requests, and reproducible across environments. Jenkins supports two Pipeline syntaxes: Declarative Pipeline (structured, […]
Rootkits are among the most dangerous forms of malware — they conceal themselves and other malicious software deep within the operating system, often modifying system binaries and kernel modules to hide their presence from standard tools. Detecting rootkits requires specialised scanners that check for known signatures, hidden files, suspicious processes, and tampered system binaries. This […]
🟡 Medium ⏱ 5–30 min Last verified: 26 May 2023 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & Cross-Refs References & Further […]
Software RAID (Redundant Array of Independent Disks) allows you to combine multiple physical disks into a single logical device that provides redundancy, performance, or both — entirely in software without dedicated hardware. On RHEL 9, mdadm is the standard tool for creating and managing software RAID arrays and is included in the default repositories. Unlike […]
Terraform is HashiCorp’s open-source Infrastructure as Code (IaC) tool that allows provisioning and managing cloud infrastructure (VMs, databases, networks, DNS records, Kubernetes clusters) using declarative configuration files. Unlike Ansible (which is primarily a configuration management tool that executes tasks imperatively), Terraform maintains a state file that tracks the real-world infrastructure it manages — allowing it […]
🟡 Medium ⏱ 5–30 min Last verified: 16 May 2023 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & Cross-Refs References & Further […]
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