Networking
IP Routing and Routing Protocols Explained
Every time you open a browser, send an email, or query an API, IP routing decides how your…
Author
Josphat Mutai
How To
Run SQL Queries on CSV Files from the Command Line
Working with CSV files is routine for sysadmins, data engineers, and developers. But loading CSVs into a full…
How To
Install Visual Studio Code on Ubuntu 24.04 / Debian 13
Visual Studio Code (VS Code) is the most popular code editor used by developers worldwide. Built by Microsoft,…
Storage
Install Pydio Cells File Sharing on Ubuntu 24.04
Pydio Cells is a modern, open-source file sharing and synchronization platform built on a microservices architecture. It replaces…
Email
Configure Whitelist and Blacklist in Zimbra Amavis
Zimbra uses Amavis as the gateway between Postfix and content checkers like SpamAssassin and ClamAV. Every inbound and…
Debian
Install EGroupware on Ubuntu 24.04 / Debian 13
EGroupware is an open-source collaboration suite written in PHP that provides calendar, email, contacts, project management, file sharing,…
Email
Configure Secure Password Policy on Zimbra
Zimbra Collaboration Suite stores mailbox credentials in its internal LDAP directory. A weak password policy means accounts with…
How To
Auto-Renew Let’s Encrypt SSL on Apache Tomcat
Let’s Encrypt provides free, automated TLS certificates that expire every 90 days. When running Apache Tomcat as your…
How To
Install Apache Hadoop and HBase on Ubuntu 24.04
Apache Hadoop is a distributed storage and processing framework built for handling large datasets across clusters of commodity…
Linux Tutorials
Install SuiteCRM on Ubuntu 24.04 with Nginx
SuiteCRM is a free, open-source Customer Relationship Management (CRM) platform forked from SugarCRM Community Edition. It handles sales…
Virtualization
Fix libvirt Firewall Backend Error on Arch Linux / Manjaro
Libvirt on Arch Linux and Manjaro defaults to using iptables for managing virtual network firewall rules. If your…
Cloud
Create AWS IAM Users and Groups with AWS CLI
AWS Identity and Access Management (IAM) controls who can access what in your AWS account. It handles authentication…