Zammad is an open-source helpdesk and ticketing system written in Ruby on Rails. It consolidates customer support requests…
An SSH key passphrase encrypts the private key file on disk so that a stolen key file alone…
VirtualBox is a free, open source Type 2 hypervisor from Oracle that lets you run multiple guest operating…
LibreNMS is an open-source network monitoring system built on PHP, MySQL/MariaDB, and SNMP. It provides auto-discovery of network…
Redis is an in-memory data structure store used as a database, cache, message broker, and streaming engine. It…
PostgreSQL 17 brings meaningful improvements to logical replication, query performance, and memory management. This guide walks through a…
Nginx sits behind a significant portion of the internet’s busiest websites. It handles static content with minimal resource…
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Running your own mail server gives you full control over email delivery, storage, and privacy. This guide walks…
Nagios Core remains one of the most battle-tested infrastructure monitoring platforms available. It watches your hosts, services, and…
Text processing is one of the most practical skills a Linux administrator uses daily. Log analysis, configuration file…
Dolt is a SQL database with Git-style version control built in. Every table, row, and schema change can…
