sysadmin – Page 3 – ITFROMZERO

Upgrading to Ubuntu Server 24.04 LTS: A Practical Guide to a Safe Finish

By admin May 6, 2026

A practical guide to upgrading Ubuntu Server 22.04 to 24.04 LTS. A safe 5-step process using Screen to prevent network drops and handle package conflicts for Sysadmins.

VMware

VMDK Shrinking Masterclass: Reclaim Hundreds of GBs for VMware ESXi and Workstation

By admin May 5, 2026

Detailed guide on how to shrink VMDK files in VMware Workstation and ESXi using SDelete, vmkfstools, and dd to reclaim hundreds of gigabytes of disk space.

VMware

Mastering OVF Tool: A Faster and More Stable VMware VM Migration Solution than GUI

By admin May 4, 2026

Say goodbye to browser-based VM upload errors. Discover how to use OVF Tool for fast, stable VMware VM exports and imports, including expert automation scripts.

Linux

Slow Linux Boot? Use systemd-analyze to Trace and Optimize Immediately

By admin May 3, 2026

Don't let your Linux server boot slowly. Learn how to use systemd-analyze to track down bottlenecks and effectively optimize boot time in just a few steps.

Ubuntu

Joining Ubuntu Server to Windows AD with SSSD: Centralized Management for Hundreds of Users

By admin May 3, 2026

Manually managing users on dozens of Ubuntu servers is a nightmare. This guide shows how to use SSSD to join Ubuntu Server to Windows AD for centralized management, automated home directories, and enhanced security.

Network

Implementing Dynamic Routing on Linux with FRRouting (FRR): From OSPF to BGP

By admin May 2, 2026

Instead of manual static route configuration, use FRRouting (FRR) to automate your Linux network. A detailed guide on practical OSPF and BGP setup.

Centos

Mastering NFS on CentOS Stream 9: High-Speed Data Sharing Solutions for Clusters

By admin May 1, 2026

A detailed guide on installing NFS Server/Client on CentOS Stream 9. This article focuses on practical steps, fstab optimization, and resolving SELinux issues.

Python

Mastering Paramiko: Automating SSH and SFTP for Systems with Hundreds of Servers

By admin May 1, 2026

Learn how to use Paramiko to automate SSH and SFTP. Master remote command execution, file management, and performance optimization for managing multiple servers with Python.

Network

Wake-on-LAN (WoL) on Linux: Don’t Let Turning On Your Server Become a Nightmare

By admin May 1, 2026

Stop letting remote server management haunt you. Here is a detailed guide on configuring Wake-on-LAN on Linux to boot your server remotely with a single command.

Monitoring

Checkmk 101: Unified IT Monitoring on a Single Dashboard

By admin May 1, 2026

Centrally manage everything from Linux/Windows servers to Cisco and Mikrotik switches on a single dashboard. A detailed guide to optimizing IT infrastructure monitoring.