Linux Archives - Page 2 of 33 - ITFROMZERO

Securing MongoDB Server on Linux: Configuring RBAC, TLS, and Encryption at Rest

By IT From Zero October 9, 2026

Practical production security guide for MongoDB Server on Linux: configure RBAC with least privilege, enable TLS encryption in transit, and set up Encryption at Rest for disk security.

Virtualization

How to Set Up Virtual Machine Manager (VMM) on Synology NAS: Running Linux and Windows VMs from Your NAS

By IT From Zero October 8, 2026

Synology Virtual Machine Manager (VMM) lets you run Linux and Windows virtual machines directly on your NAS without a dedicated server. This guide walks through every step: checking hardware compatibility, installing VMM, configuring storage and a virtual switch, creating VMs, and setting up monitoring.

Linux

Configuring DNS-over-TLS with systemd-resolved on Linux: Boost Security for DNS Resolution

By IT From Zero October 8, 2026

A guide to configuring DNS-over-TLS and DNSSEC with systemd-resolved on Linux — encrypting DNS queries to block ISP eavesdropping and man-in-the-middle attacks. Includes a 5-minute quick start, DNSSEC configuration, per-link DNS, and debugging tips from real production experience.

Security

How to Install and Configure Fail2ban on Linux: Hands-On Defense Against SSH and Nginx Brute Force

By IT From Zero October 7, 2026

A step-by-step guide to installing and configuring Fail2ban on Linux to block SSH and Nginx brute-force attacks, with real-world unban tips and incremental ban rules for repeat offenders.

Ubuntu

How to Install and Configure WireGuard VPN Server on Ubuntu: Setting Up a High-Speed Virtual Private Network

By IT From Zero October 7, 2026

A step-by-step guide to building a WireGuard VPN server on Ubuntu. Master Cryptokey Routing, tune MTU to prevent packet bottlenecks, and generate QR codes for quick client setup.

Artificial Intelligence tutorial - IT technology blog

Installing and Configuring Dify on Linux with Docker: Building Production-Ready AI Workflows and RAG

By IT From Zero October 7, 2026

A detailed guide on installing Dify on Linux using Docker Compose, setting up Nginx SSL with SSE streaming support, and optimizing resources for production.

Security

Securing PostgreSQL Server on Linux: Hands-on with pg_hba.conf, pgcrypto, and pgaudit

By IT From Zero October 6, 2026

Protect PostgreSQL on Linux across 3 layers: restrict IPs with pg_hba.conf, encrypt sensitive columns with pgcrypto, and audit logs for SOC2/PCI-DSS with pgaudit.

Network

How to Set Up an Internal Chrony NTP Server on Linux: Accurate and Secure for Production

By IT From Zero October 5, 2026

A hands-on guide to resolving distributed clock drift and setting up a secure, robust internal Chrony NTP server cluster on Linux.

Fedora

Getting Started with bootc on Fedora: Build and Deploy Bootable Container Operating Systems

By IT From Zero October 4, 2026

bootc applies container packaging workflows directly to the Fedora operating system. Learn how to write Containerfiles, export QCOW2 virtual disks, and manage OS lifecycles using GitOps.

Virtualization

Rescue KVM/Proxmox VMs with libguestfs: Reset Root Password, Fix Boot Errors, and Recover Data Quickly

By IT From Zero October 3, 2026

Learn how to use the libguestfs tool suite on Linux to rescue KVM/Proxmox VMs: fix fstab errors, reset root passwords, and mount virtual disks to extract data with single commands.