How to Configure Network Interface Settings with nmcli on RHEL 7 Network configuration on RHEL 7 is managed by the NetworkManager service, and the primary command-line interface for NetworkManager is nmcli. Unlike directly editing /etc/sysconfig/network-scripts/ files — which still works but is error-prone — nmcli provides a structured, validated way to create, modify, and activate […]
Introduction Debian 10 Buster is built around the ethos of stability and free software. Setting up configure opentelemetry collector on debian 10 on Buster leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Buster freeze. Follow each step carefully and the […]
How to Manage System Packages with yum on RHEL 7 Package management is one of the most fundamental skills for a RHEL 7 system administrator. The Yellowdog Updater Modified (yum) is the default package manager on RHEL 7, and it handles everything from installing and removing software to managing repositories, grouping related packages, and maintaining […]
Introduction Debian 10 Buster is built around the ethos of stability and free software. Setting up install graylog log management on debian 10 on Buster leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Buster freeze. Follow each step carefully and […]
How to Perform a System Security Audit with auditd on RHEL 7 Security auditing is a critical practice for any production RHEL 7 system, especially those subject to compliance frameworks such as PCI-DSS, HIPAA, or DISA STIG. The Linux Audit Framework, centered on the auditd daemon, provides kernel-level monitoring of system calls, file access, user […]
Introduction Debian 10 Buster is built around the ethos of stability and free software. Setting up set up the elastic stack elk on debian 10 on Buster leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Buster freeze. Follow each step […]
How to Install and Configure vim and nano on RHEL 7 Every Linux system administrator spends a significant portion of their time editing configuration files, scripts, and documentation directly on the server. RHEL 7 includes the minimal vi editor by default, but the full-featured vim and the beginner-friendly nano are far more practical for daily […]
Introduction Deploying configure telegraf metrics agent on debian 10 on a Debian 10 Buster machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites You will […]
Introduction This guide explains how to Install Icinga2 on Debian 10 on Debian 10 Buster. Debian Buster uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 10 install with the standard repositories […]
How to Use journalctl for Systemd Log Analysis on RHEL 7 On RHEL 7, the traditional syslog infrastructure is complemented — and in many cases replaced — by the systemd journal, managed by systemd-journald. The journalctl command is your primary interface for querying, filtering, and exporting log data collected by this service. Unlike flat text […]
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