The Linux kernel exposes hundreds of tunable parameters through the sysctl interface, allowing system administrators to optimize network throughput, memory management, and file descriptor limits without recompiling the kernel. On RHEL 9, these tunables persist across reboots when placed in drop-in configuration files under /etc/sysctl.d/. Proper kernel tuning can dramatically reduce latency and increase throughput […]
ZFS (Zettabyte File System) delivers enterprise-grade data integrity features including checksumming, copy-on-write snapshots, built-in RAID, and efficient replication — without requiring a separate volume manager. Although ZFS is not included in RHEL 9’s default kernel, the OpenZFS project provides DKMS-based packages that work reliably on RHEL 9. This tutorial covers installing OpenZFS, creating pools and […]
ISC DHCP (Internet Systems Consortium DHCP Server) is the most widely deployed open-source DHCP implementation and provides flexible IP address management for networks of any size. On RHEL 9, the dhcp-server package provides dhcpd, which handles both dynamic leases and static address reservations from a single configuration file. Although ISC announced the end-of-life of ISC […]
Bacula is a mature, enterprise-grade open-source backup solution that manages backup, recovery, and data verification across heterogeneous networks. It uses a three-tier architecture — Director, Storage Daemon, and File Daemon — allowing centralised policy management with distributed storage targets. On RHEL 9, Bacula packages are available from the EPEL repository and integrate naturally with systemd. […]
Samba implements the SMB/CIFS protocol on Linux, enabling seamless file sharing between RHEL 9 servers and Windows clients — as well as other Linux systems. It is the go-to solution for mixed-OS environments where Windows users need to access Linux-hosted files using the same UNC paths and credential prompts they are accustomed to. On RHEL […]
Introduction RHEL 10 ships with a stable, security-hardened base that makes deploying monitor mariadb with mysqld_exporter both straightforward and auditable. This tutorial covers the complete procedure for how to Monitor MariaDB with mysqld_exporter on RHEL 10, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for network-facing services. Prerequisites You […]
AIDE (Advanced Intrusion Detection Environment) builds a cryptographic database of file attributes and checksums, then alerts you whenever a monitored file changes unexpectedly — a technique known as file integrity monitoring (FIM). On RHEL 9, AIDE is available in the standard repositories and integrates cleanly with systemd timers for scheduled checks and with auditd for […]
GoAccess is a fast, open-source real-time web log analyzer that runs entirely in the terminal or generates self-contained HTML reports without requiring a separate database or web framework. On RHEL 9, it can parse Nginx access logs in seconds to surface the metrics that matter most — unique visitors, top requested URLs, HTTP response code […]
Introduction How to Install Zabbix 7 on RHEL 10 on RHEL 10 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration is reproducible and […]
VictoriaMetrics is a high-performance, open-source time-series database and monitoring solution that is fully compatible with the Prometheus query API. It offers significantly better data compression, faster ingestion rates, and lower memory consumption compared to Prometheus, making it an attractive choice for large or long-retention deployments. On RHEL 9 you can run VictoriaMetrics as a drop-in […]
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