sysadmin – Page 8 – ITFROMZERO

Virtualization tutorial - IT technology blog

Proxmox Cluster Network Management: Stop Manually Editing Configs, Use SDN!

By admin April 27, 2026

Forget manual interface file editing! Here is a detailed guide on configuring SDN in Proxmox VE for centralized, secure, and fast VLAN and VNet management across your cluster.

VMware

Installing VMware Tools on Linux: Don’t Let Your VM Run at a Snail’s Pace

By admin April 26, 2026

Installing VMware Tools on Linux is easy if you use open-vm-tools. This guide provides detailed steps to install, fix copy-paste issues, and enable Shared Folders quickly.

Linux

Real-time File Monitoring with inotifywait: Effortless Automation on Linux

By admin April 26, 2026

Master real-time file and directory monitoring on Linux with inotifywait. Expert tips on avoiding infinite loops and optimizing max_user_watches for Sysadmins.

Ubuntu

How to Register Ubuntu Pro for Free: 10 Years of Security, Kernel Updates Without Rebooting

By admin April 26, 2026

Learn how to activate Ubuntu Pro for free to receive 10 years of security patches. Use Livepatch to update the Kernel immediately without rebooting the server.

Ubuntu

Building a Local APT Repository on Ubuntu with Aptly: Manage Internal Packages at Scale

By admin April 26, 2026

Managing Ubuntu packages for large-scale systems has never been easier. A detailed guide on setting up a Local APT Repository with Aptly to optimize speed and achieve absolute version control.

Linux

OOM Killer: Why Linux Kills Your MySQL and How to Protect It

By admin April 24, 2026

When a Linux application shuts down unexpectedly, the OOM Killer is often to blame. Learn how to read dmesg logs, understand the oom_score metric, and protect MySQL and Redis from being terminated by the OS.

Fedora

Mastering Fedora Security: Managing System-Wide Encryption with update-crypto-policies

By admin April 23, 2026

Linux encryption management has never been easier. Learn how to use update-crypto-policies on Fedora to tighten TLS and SSH security for an entire enterprise-standard system.

Linux

Say Goodbye to Cron Jobs: Switching to systemd Timers for Superior Task Scheduling

By admin April 22, 2026

Learn to use systemd Timers for Linux task scheduling as a replacement for Cron Jobs. A detailed guide on configuring auto-retries, centralized logging, and resource limits.

Security

Moving from iptables to nftables: Why It’s a Mandatory Step for SysAdmins

By admin April 22, 2026

Iptables is outdated and slow. Discover how nftables optimizes firewall performance, supports IPv4/IPv6 simultaneously, and how to safely migrate your Linux system.

Linux

Boosting Linux Server I/O Performance: noatime and tuned profile Tips

By admin April 22, 2026

A quick guide to optimizing Linux I/O performance by configuring noatime and using tuned profiles to reduce system latency.