Secure your Linux server
This guide on Linux server security brings together the basic configuration steps that must be followed to protect systems against external threats. The constantly updated content offers a practical guide to the best methods that can be applied in server hardening processes.
Updates
- August 31, 2026: Stars 29,237 → 30,981.
What you get
- Methods to tighten server access
- Techniques to prevent unauthorized access
- Configuring automatic security updates
Installation
sudo apt install libpam-pwqualityIf you don't write code
I'm a Linux server administrator. I want to increase the security of my server. Based on the best practices in the How-To-Secure-A-Linux-Server guide; How can I make my SSH configuration more secure, restrict sudo and su privileges, and enable automatic security updates on my system? Please explain the basic principles I should pay attention to when doing these operations and the steps I should follow to avoid making mistakes.
Repository: https://github.com/imthenachoman/How-To-Secure-A-Linux-Server. Follow the official instructions in the README of this repository for setup and execution.
Before starting, check which OS we are on and if the necessary tools (e.g., Python, Node.js, Git, Docker) are installed. Install any missing ones step-by-step according to this system.
Create a new, empty folder to work in. Do not touch any files outside this folder and do not delete anything. Tell me what you are going to do in one sentence before running each command.
Tell me what I should see on the screen at the end of each step. If an error occurs, I will paste the error message to you exactly as it is, and we will fix it together.
Related dictionary terms
Links
TreScout did not build this tool · we found it in GitHub trends and wrote it up. This page describes the repository as of 2026-07-10: The star count and our text belong to that day, the repository may have changed since. Check the repository link for the current state. The introductory text was prepared with AI from the repository's own documentation, and this page was machine-translated from the Turkish original · the Turkish version prevails.