Practical Linux security & sysadmin guides for small teams.
Learn server hardening, automation, Nginx TLS configuration, backups,
monitoring, Zero Trust architecture, and security best practices.
Secure Enclaves for Sensitive Data Processing on Debian
TL;DR This guide provides a quick setup for secure enclaves on Debian 13 to process sensitive data. We’ll use Intel SGX (Software Guard Extensions) as an example of a secure enclave technology. Install Required Packages First, update your package list and install the necessary packages for Intel SGX. sudo apt update && sudo apt install -y dkms libsgx-enclave-common libsgx-urts Enable Intel SGX Ensure that Intel SGX is enabled in your BIOS. This step is hardware-specific, so consult your motherboard’s manual. ...
Confidential Computing with Intel SGX on Debian
TL;DR This guide provides a quick setup for enabling Intel Software Guard Extensions (SGX) on a Debian 13 server. SGX allows you to create secure enclaves for sensitive computations. Follow these steps to install and configure SGX. Install Required Packages First, update your package list and install the necessary packages: ...
ARM TrustZone Security on Debian ARM64
TL;DR ARM TrustZone provides a secure environment for sensitive operations on ARM64 architectures. This guide covers setting up and verifying TrustZone on Debian 13 ARM64. Install Required Packages First, ensure your system is up-to-date and install necessary packages: sudo apt update && sudo apt upgrade -y # Update and upgrade system packages sudo apt install -y qemu-system-arm # Install QEMU for ARM emulation Verify TrustZone Support Check if your ARM64 CPU supports TrustZone: ...
RISC-V Security Features on Debian
TL;DR This section provides a quick guide to implementing RISC-V security features on Debian 13. It covers essential configurations and commands to enhance security on RISC-V architecture. Update and Upgrade First, ensure your system is up-to-date: sudo apt update && sudo apt upgrade -y Secure Boot Enable Secure Boot to prevent unauthorized code execution during the boot process. ...
Memory Protection with Intel CET on Debian
TL;DR Intel Control-flow Enforcement Technology (CET) enhances memory protection by preventing common security exploits like Return-Oriented Programming (ROP). This guide will help you enable CET on Debian 13. Check CPU Support First, verify if your CPU supports CET: grep -E 'cet|ibt|shstk' /proc/cpuinfo | uniq # Check CPU flags for CET support Note: Look for cet, ibt (Indirect Branch Tracking), or shstk (Shadow Stack) in the flags. ...
Control Flow Integrity (CFI) Implementation on Debian
TL;DR To implement Control Flow Integrity (CFI) on Debian 13, you need to install the necessary packages. Use the following command: sudo apt update && sudo apt install clang llvm -y Compile with CFI When compiling your application, use Clang with specific flags to enable CFI. Here’s an example for a C program: ...
Kernel Integrity Monitoring with IMA/EVM on Debian
TL;DR This guide provides a quick setup for Kernel Integrity Monitoring using IMA (Integrity Measurement Architecture) and EVM (Extended Verification Module) on Debian 13. These tools help ensure the integrity of your system by verifying the integrity of files and directories. Install Required Packages First, ensure your system is up-to-date and install the necessary packages: ...
Linux Malware Detection and Prevention Guide
TL;DR To quickly set up malware detection, install ClamAV: sudo apt update && sudo apt install clamav clamav-daemon -y # Update package list and install ClamAV Update ClamAV Database Ensure ClamAV’s virus database is up-to-date: sudo freshclam # Update ClamAV virus definitions Scan for Malware Run a scan on the /home directory: sudo clamscan -r /home # Recursively scan the /home directory Schedule Regular Scans Automate scans using cron: ...
Docker Security Best Practices for Linux Servers
TL;DR To install Docker on Debian 13, update your package index and install Docker using the official Docker repository: sudo apt update # Update package index sudo apt install -y ca-certificates curl gnupg # Install necessary packages ## Add Docker's official GPG key sudo mkdir -p /etc/apt/keyrings curl -fsSL https://download.docker.com/linux/debian/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg ## Set up the Docker repository echo \ "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/debian \ $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null sudo apt update # Update package index again sudo apt install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin # Install Docker User Management Add your user to the docker group to run Docker commands without sudo: ...
Linux Security Monitoring: Tools and Techniques for 2026
TL;DR For effective security monitoring on Debian 13, you’ll need to employ a combination of tools and techniques. This guide provides a quick setup to get you started with essential security monitoring tools. Install and Configure Auditd Auditd is a powerful tool for monitoring system events. sudo apt update && sudo apt install auditd -y # Install auditd sudo systemctl enable auditd # Enable auditd to start on boot sudo systemctl start auditd # Start the auditd service Configure Auditd to monitor specific files or directories: ...