sysadmin Archives - Page 6 of 11

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.

Security

Stopping BadUSB: My 6-Month Experience Hardening Linux with USBGuard

April 18, 2026

Physical USB ports are a massive security blind spot. This guide shows you how to use USBGuard to whitelist trusted devices and block BadUSB attacks on Linux.

Linux

Clonezilla: The No-Nonsense Guide to Linux Disk Imaging and Recovery

April 18, 2026

Ditch the generic backup tools. This expert guide shows you how to use Clonezilla for block-level imaging, network backups via SSH, and restoring systems to smaller disks.

Linux

Taking Control of Linux PAM: A Practical Guide to System Authentication

April 17, 2026

Learn how to configure Linux Pluggable Authentication Modules (PAM) to enforce account locking, time-based access, and robust security policies without locking yourself out.