Introduction How to Configure Zabbix Agent on Debian 10 is a fundamental operation for any administrator maintaining a Debian 10 Buster server. Debian 10 Buster 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 from Debian 10. This […]
Introduction This guide explains how to Install Zabbix Server 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 […]
How to Schedule Automated Tasks with cron and anacron on RHEL 7 Automation is at the heart of effective Linux system administration. Red Hat Enterprise Linux 7 provides two complementary scheduling systems: cron for tasks that need to run at precise times on continuously running servers, and anacron for tasks that must eventually run on […]
How to Manage Users and Groups with useradd, groupadd and passwd on RHEL 7 User and group management is one of the most fundamental administrative tasks on any Linux system. On Red Hat Enterprise Linux 7, the tools for creating, modifying and maintaining user accounts are robust, flexible and follow the standard POSIX conventions. Whether […]
How to Configure Log Rotation with logrotate on RHEL 7 Log files are essential for diagnosing system problems, tracking security events, and auditing application behavior. However, without proper management, log files grow without bound and can fill your disk, causing service outages and making historical logs difficult to navigate. logrotate is the standard log rotation […]
How to Create and Manage Swap Space on RHEL 7 Swap space is a designated area on disk that the Linux kernel uses as an overflow when physical RAM is exhausted. While swap is not a substitute for adequate RAM — disk I/O is orders of magnitude slower than memory access — it is a […]
How to Sync Time with Chrony on RHEL 7 Accurate system time is critical for nearly every networked service on a Linux server. Log correlation, SSL certificate validation, Kerberos authentication, database replication, and distributed systems all depend on clocks that are closely synchronized across machines. Red Hat Enterprise Linux 7 ships with Chrony as the […]
How to Add and Delete Users on RHEL 7 User account management is one of the most fundamental administrative tasks on any Linux server. On Red Hat Enterprise Linux 7, the standard command-line tools — useradd, usermod, userdel, and passwd — give you precise control over every aspect of a user’s account: their login name, […]
Patroni is a Python-based high-availability solution for PostgreSQL that uses a distributed configuration store — in this tutorial, etcd — to manage leader election, automatic failover, and cluster membership. On RHEL 8, both Patroni and etcd are available through the EPEL repository, making the installation straightforward. This guide walks through installing PostgreSQL, etcd, and Patroni, […]
Introduction Deploying set up mariadb galera cluster 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 Ensure […]
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