/ubuntu-ssh

在 Ubuntu 中配置 SSH 的完整指南

MIT LicenseMIT

SSH Configuration Guide for Ubuntu

Introduction

This README provides a detailed guide on how to configure SSH (Secure Shell) on an Ubuntu system. SSH is a protocol allowing secure remote login from one computer to another.

Prerequisites An Ubuntu server A non-root user with sudo privileges

  • Step 1: Install SSH
sudo apt update
sudo apt install openssh-server

Check the status of the SSH service:

sudo systemctl status ssh
  • Step 2: Configure SSH (Optional) Edit the SSH configuration file:
sudo nano /etc/ssh/sshd_config

Make necessary changes, like changing the default port or disabling root log in.

Restart SSH service to apply changes:

sudo systemctl restart ssh
  • Step 3: Connect from Client From the client machine, connect to the server:
ssh your_username@server_ip_address

Replace your_username and server_ip_address with your actual username and server IP.

  • Step 4: Additional Security (Optional) Set up SSH keys for a passwordless login. Configure firewalls and fail2ban to enhance security.
sudo ufw allow ssh

Conclusion

This guide covers the basics of setting up SSH on Ubuntu. Adjust settings according to your security needs and environment.