Netdata is a lightweight, real-time performance monitoring agent that collects thousands of system and application metrics with per-second granularity and displays them through a built-in, zero-configuration web dashboard. Unlike heavier stacks, Netdata starts delivering useful insights within minutes of installation and requires virtually no ongoing maintenance. It can also stream metrics to a central parent […]
Zabbix is a mature, enterprise-grade open-source monitoring platform capable of tracking availability, performance, and log data for thousands of hosts from a single server. It ships with auto-discovery, customizable triggers, rich alerting integrations, and a polished web interface. Installing Zabbix 6.x on RHEL 8 takes roughly thirty minutes and gives you production-ready monitoring backed by […]
File Integrity Monitoring (FIM) detects unauthorized changes to critical system files, binaries, and configuration directories — a key control for detecting intrusions and satisfying compliance requirements such as PCI-DSS and CIS benchmarks. Tripwire Open Source computes cryptographic hashes of monitored files at a baseline and alerts you to any subsequent modifications. This tutorial covers installing […]
Running your own Certificate Authority (CA) with OpenSSL gives you complete control over the certificates issued to your internal services, enabling mutual TLS, encrypted internal APIs, and custom certificate policies without relying on commercial CAs for private infrastructure. On RHEL 8, OpenSSL is pre-installed and the system trust store is managed through the ca-trust framework, […]
HashiCorp Vault is an industry-standard secrets management platform that stores, generates, and controls access to sensitive values such as API keys, database passwords, TLS certificates, and encryption keys. Unlike storing secrets in environment variables or configuration files, Vault provides audit logging, dynamic credentials with short TTLs, and fine-grained access policies. On RHEL 8, Vault installs […]
AIDE (Advanced Intrusion Detection Environment) is a host-based intrusion detection tool that detects unauthorized changes to files and directories by comparing a live system snapshot against a baseline database. On RHEL 8, AIDE is available directly from the standard repositories and integrates cleanly with systemd for scheduled integrity checks. Detecting modified binaries, configuration files, or […]
Rootkits are malicious software packages designed to gain persistent, hidden root-level access to a system by replacing or patching critical binaries, kernel modules, or configuration files. Two widely used open-source tools — rkhunter (Rootkit Hunter) and chkrootkit — complement each other by using different detection techniques: signature databases, hash comparisons, and behavioural checks. On RHEL […]
Lynis is a battle-tested open-source security auditing tool that scans your Linux system, identifies misconfigurations, and produces a prioritised list of hardening suggestions. On RHEL 8, it is available through the EPEL 8 repository and runs entirely from the command line without requiring a daemon or persistent service. After each scan, Lynis assigns a hardening […]
ClamAV is an open-source antivirus engine widely used on Linux servers to scan for malware in email attachments, uploaded files, and shared storage directories. Although Linux malware is less common than its Windows counterpart, RHEL 8 servers often act as intermediaries that receive and redistribute files to mixed-OS environments, making antivirus scanning an important layer […]
Introduction How to Set Up ProxySQL for MySQL Load Balancing on Debian 11 is a fundamental operation for any administrator maintaining a Debian 11 Bullseye server. Debian 11 Bullseye ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ […]
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