sysadmin Archives - Page 7 of 12

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Beyond Telnet: Mastering Netcat and Socat for Linux Network Triage

April 27, 2026

Master Netcat and Socat for precise Linux network debugging. This guide provides practical examples for port scanning, 100MB/s+ file transfers, and secure SSL relays.

Linux

Joining Linux to Active Directory: A No-Nonsense Guide to SSSD and Realmd

April 27, 2026

Learn how to integrate Linux servers into an Active Directory domain using SSSD and Realmd. This guide covers installation, domain joining, and advanced configurations like sudo permissions and group-based access control.

Linux

Cracking the CPU Bottleneck: A Real-World Guide to Linux Perf

April 26, 2026

Ditch the guesswork. This guide shows you how to use Linux perf to diagnose CPU bottlenecks, capture stack traces, and implement 10x performance wins using real-world engineering examples.

Linux

Demystifying the Linux Boot Process: From Power-On to Login

April 26, 2026

Ever wonder what happens between pressing the power button and the login prompt? We break down the four stages of the Linux boot process—UEFI, GRUB, Kernel, and systemd—to help you troubleshoot like a senior admin.

Linux

Hướng dẫn cài đặt và sử dụng Cockpit: Quản lý Linux Server tập trung qua giao diện Web

April 23, 2026

Ditch the complex CLI commands for daily monitoring. Learn how to install and secure Cockpit to manage multiple Linux servers through a fast, lightweight web interface.

Networking

Wake-on-LAN Over the Internet: Configure Your Router and Linux Server for Remote Boot

April 21, 2026

A practical guide to configuring Wake-on-LAN on Linux and your router so you can remotely power on any physical machine over the internet. Covers ethtool setup, systemd persistence, router port forwarding, and a full wake+connect script.

Networking

Centralize Your Network Auth: A Deep Dive into FreeRADIUS and LDAP

April 21, 2026

Ditch manual user management. Learn how to set up FreeRADIUS with LDAP to centralize your Wi-Fi and VPN authentication for a more secure, scalable network.

Security

Kill the 2 AM Password Prompt: Auto-Unlock LUKS with TPM 2.0

April 21, 2026

Stop typing LUKS passphrases manually. This guide shows you how to use TPM 2.0 and Clevis to securely automate disk decryption on Linux, ensuring your servers reboot without intervention.

Security

Linux Ransomware: Building the ‘Impossible to Encrypt’ Server

April 19, 2026

Recovering from ransomware at 2 AM is a nightmare. Learn how to use Linux immutable attributes and S3 Object Lock to build a server that physically rejects encryption attempts.