Ubuntu Archives - Page 12 of 12 - ITFROMZERO

Installing and Configuring Samba on Ubuntu: File Sharing with Windows

By IT From Zero March 1, 2026

A practical guide to installing and configuring Samba on Ubuntu 22.04 for sharing files with Windows machines on a local network. Covers smb.conf configuration, user creation, directory permissions, firewall setup, and connection monitoring.

Virtualization

KVM Installation and Usage Guide on Ubuntu: From Zero to Your First Virtual Machine

By IT From Zero March 1, 2026

KVM is a hypervisor built into the Linux kernel, offering better performance than VirtualBox and remaining stable after kernel updates. This guide covers installing KVM on Ubuntu, creating VMs from ISO using virt-install, and managing VMs daily with virsh — suitable for both servers and desktops.

MySQL

MySQL Master-Slave Replication Setup: From Real Incidents to Solutions

By IT From Zero March 1, 2026

A complete guide to MySQL Master-Slave Replication from start to finish, solving database overload and single point of failure. Covers each step from configuring Binary Log and creating the replication user to connecting and verifying the Slave.

Ubuntu

Installing Free Let’s Encrypt SSL on Ubuntu with Certbot: From Real Errors to Auto-Renewal

By IT From Zero February 28, 2026

A cert expiring at 2am — a nightmare I've lived through. This guide covers everything: installing certbot via snap (the official method since 2021), fixing the most common errors, and setting up a deploy hook so nginx auto-reloads after renewal. Never get caught off guard by an expired cert again.

Network

Setting Up a DNS Server with Bind9 on Ubuntu/Debian

By IT From Zero February 28, 2026

A step-by-step guide to setting up an internal DNS server with Bind9 on Ubuntu/Debian: installation, forward and reverse zone files, forwarder and ACL configuration, testing, and troubleshooting. Written from real-world experience managing an office network.

Security

Complete Guide to Installing and Configuring OpenVPN on Ubuntu Server from A to Z

By IT From Zero February 28, 2026

A complete guide to installing and configuring OpenVPN on Ubuntu Server, covering everything from CA creation and client certificate signing to split tunneling configuration and security hardening tips drawn from real-world server audits.

Ubuntu

Things to Do After Installing Ubuntu Server 22.04 to Avoid 2 AM Disasters

By IT From Zero February 28, 2026

A practical checklist of what to do right after installing Ubuntu Server 22.04: secure SSH with key-based authentication, enable UFW firewall, create a swap file, configure timezone, and set up Fail2ban — all distilled from real-world production incident experience.