How to Configure Logrotate for Application Logs on RHEL 7 Log files are essential for diagnosing problems and auditing system activity, but left unmanaged they will silently consume all available disk space and eventually bring a server to a halt. Logrotate is the standard tool on RHEL 7 for automating log file rotation, compression, and […]
How to Install Netdata on RHEL 7 Netdata is a real-time performance monitoring agent that delivers per-second metrics with zero configuration on most Linux systems. Unlike heavier monitoring solutions that scrape on 15-second or 1-minute intervals, Netdata collects and stores data every second, making it ideal for diagnosing transient performance problems that would be invisible […]
How to Install Zabbix on RHEL 7 Zabbix is a mature, enterprise-grade open-source monitoring platform that supports agent-based and agentless monitoring of servers, network devices, applications, and cloud resources. It combines metrics collection, event correlation, alerting, and visualisation in a single self-hosted solution — making it a compelling choice for organisations that need full control […]
How to Set Up the ELK Stack on RHEL 7 The ELK Stack — Elasticsearch, Logstash, and Kibana — is the industry-standard open-source solution for centralised log management and analysis. Elasticsearch stores and indexes log data at scale, Logstash ingests and transforms log streams from any source, and Kibana provides a powerful web UI for […]
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 Encrypt Disk Partitions with LUKS on RHEL 7 Linux Unified Key Setup (LUKS) is the standard for disk encryption on Linux, providing a robust, well-documented format for encrypted block devices. By encrypting partitions with LUKS, you ensure that data remains unreadable if physical drives are removed or a server is decommissioned without proper […]
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 […]
How to Harden Web Servers: Security Headers, CSP and HSTS on RHEL 7 HTTP security headers are one of the most cost-effective controls available to web server administrators. They instruct the browser to enforce strict content handling rules, preventing common attacks such as cross-site scripting (XSS), clickjacking, MIME-type confusion, and protocol downgrade attacks — without […]
How to Scan for Vulnerabilities with OpenVAS on RHEL 7 OpenVAS (Open Vulnerability Assessment System), now part of the Greenbone Vulnerability Management (GVM) framework, is one of the most capable open-source vulnerability scanners available. It maintains a continuously updated feed of over 50,000 Network Vulnerability Tests (NVTs) and can detect misconfigurations, outdated software, missing patches, […]
How to Configure DNSSEC on RHEL 7 DNS Security Extensions (DNSSEC) add a layer of cryptographic verification to the Domain Name System, protecting users from cache poisoning attacks, man-in-the-middle redirects, and forged DNS responses. By digitally signing DNS zone data, DNSSEC allows resolvers to confirm that the records they receive are authentic and unmodified. This […]
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